ARDMS OB/GYN Exam Prep: Free Study Guide, Plan & Practice Questions
Start your ARDMS OB/GYN exam prep with the worked measurement example, then use 24 original practice questions with full explanations and the six-week plan.
Worked example: is this image ready to measure?
Written image-quality example; no sonogram is shown.
A proposed abdominal circumference (AC) image shows the stomach, the umbilical vein at the level of the portal sinus, and both kidneys. Is it ready for measurement?
Show the measurement check
No. Get a new image first. ISUOG's criteria for the AC plane are the stomach visible, the umbilical vein at the portal sinus, and the kidneys not visible. Seeing the kidneys means the section isn't the standard one. Once the plane is right, place the ellipse on the outer surface of the skin line. Moving the calipers can't fix a wrong section.
Source: ISUOG Practice Guidelines (updated): routine mid-trimester fetal ultrasound scan, Ultrasound Obstet Gynecol 2022, p. 844.
What the OB/GYN outline emphasizes
| Domain (OB/GYN Content Outline V24.1) | Share | What you need to be able to do |
|---|---|---|
| Obstetrics Second/Third Trimester | 37% | Normal fetal anatomy head to toe, fetal abnormalities, placenta and cord abnormalities, the cervix and maternal pelvic pathology |
| Protocols and Procedures | 24% | Clinical standards, the GYN and OB measurement techniques (15 obstetric measurement entries are listed), and the sonographer's role in procedures |
| Gynecology – Pelvic Anatomy and Physiology | 19% | The normal uterus, endometrium, cervix and adnexa at every life stage, plus uterine, endometrial, ovarian and pelvic pathology |
| Obstetrics – First Trimester | 12% | Early structures and 10–14 week anatomy, multiples and chorionicity, early pregnancy loss and ectopic pregnancy, molar pregnancy, nuchal translucency |
| Physics and Instrumentation | 8% | Pelvic and obstetric Doppler (MCA, ductus venosus, umbilical cord), M-mode heart rate, 3D, and ALARA safety indices |
Source: OB/GYN Content Outline V24.1, pp. 1–5.
Second- and third-trimester obstetrics plus protocols make up 61% of the exam. The protocols domain includes separate gynecologic and obstetric measurement sections, so study each fetal structure together with how it's measured, not as two separate lists.
Topics beyond routine anatomy scans. The outline goes well past routine anatomy scans. It names the fetal heart views (four-chamber, both outflow tracts, the aortic and ductal arches, the three-vessel and three-vessel-trachea views), twin complications (TTTS, TAPS, TRAP, selective growth restriction, conjoined twins), procedures (sonohysterography, amniocentesis after 15 weeks, chorionic villus sampling, IUD placement, infertility exams), and 3D imaging. If your clinical time was mostly routine OB, the gynecology domain and the procedures list are where to add hours.
Jump to: Practice questions · 6-week plan · Correction log · High-yield numbers · Image review · Exam facts
24 practice questions with explanations
Original, unofficial practice written by Castleport Test Prep. These are not ARDMS questions. Your score is feedback on these 24 items only, not a prediction of your exam score.
How to work each one: name what you actually see, list what else could explain it, then find the detail in the stem that separates them. Say your answer and your reason out loud before you reveal the explanation. That's how you find out whether you know the concept or just recognize the wording.
Carry that habit into the questions: check the plane or the setup before you interpret a finding. The set covers topics in all five exam domains, but it's a teaching sample, not a proportional mini-exam. The real exam also includes hotspot items (see Hotspot questions and image review).
OBGYN-01 · Domain 4 — Protocols & procedures · Endometrial visualization in postmenopausal bleeding (outline 4.B.1; secondary topic 1.B.5)
A 63-year-old woman, 11 years past menopause and not on hormone therapy, has had one episode of light vaginal bleeding. On long-axis transvaginal images, a visible segment of the endometrium measures 3 mm, but the endometrium cannot be seen clearly over the entire cavity despite additional views. Which reporting statement is most accurate?
Show answer and explanation
Answer: C. ISUOG says that if the endometrium cannot be seen clearly in its entirety, it should be reported as non-measurable. A measurement from one visible segment cannot establish the maximum thickness of the whole endometrium.
Why not the others:
- A — The 3 mm measurement describes only the visible segment; it cannot represent tissue that was not adequately seen.
- B — Averaging a measured value with an estimate does not recover the missing image information.
- D — Not visualized does not mean absent or zero thickness.
Takeaway: Check complete visualization before interpreting a thickness. Report the limitation instead of turning a partial view into a reassuring number.
OBGYN-02 · Domain 1 — Gynecology · Hemorrhagic cyst vs endometrioma (outline 1.B.8, 1.B.4)
A 28-year-old has sudden right pelvic pain. The right ovary contains a 3.5 cm cyst with a fine, lacy, net-like pattern of internal echoes. Color Doppler shows no flow inside the cyst. Which diagnosis is most likely?
Show answer and explanation
Answer: A. A reticular (lacy) pattern of fibrin strands and/or a retracting clot, with no internal flow, is the classic hemorrhagic cyst appearance.
Why not the others:
- B — Endometriomas typically show homogeneous, low-level, ground-glass echoes, not a lacy net.
- C — Classic dermoid features include an echogenic, shadowing component and hyperechoic lines and dots, not a reticular pattern.
- D — A simple cyst is anechoic. Internal echoes rule it out.
Takeaway: Let the internal echo pattern separate them: a lacy net favors a hemorrhagic cyst; uniform ground glass favors an endometrioma.
Source: ACR O-RADS US v2022: Classic Benign Lesions, page 2.
OBGYN-03 · Domain 1 — Gynecology · Mature cystic teratoma (dermoid) (outline 1.B.9)
An adnexal mass contains a bright echogenic nodule on its wall that casts an acoustic shadow. Multiple short hyperechoic lines and dots float in the surrounding fluid. Color Doppler shows no flow in the nodule. Which lesion fits best?
Show answer and explanation
Answer: D. The shadowing mural nodule is the Rokitansky nodule (dermoid plug). The lines and dots are hair, called the dot-dash pattern or dermoid mesh.
Why not the others:
- A — Endometriomas show diffuse, homogeneous low-level echoes, not a shadowing nodule with hair-like lines.
- B — A solid component with internal Doppler flow raises concern for malignancy. This nodule is avascular, shadowing, and comes with the dot-dash hair pattern.
- C — A hydrosalpinx is a fluid-filled tubular structure. It doesn't contain an echogenic, shadowing mural nodule.
Takeaway: Two or more classic dermoid features make the diagnosis likely.
Source: ACR O-RADS US v2022: Classic Benign Lesions, page 2; First International Consensus Report on Adnexal Masses (2017), Figure 4, p. 854; Patel et al., Cystic teratomas of the ovary: diagnostic value of sonography (1998), results and conclusion.
OBGYN-04 · Domain 1 — Gynecology · Ovarian torsion and Doppler (outline 1.B.11, 4.A.4, 5.A.1)
A 24-year-old has sudden, severe left pelvic pain with nausea. The left ovary is enlarged, with swollen central stroma, follicles pushed to the periphery, and a twisted vascular pedicle. Color Doppler still shows some arterial flow within the ovary. What is the best interpretation?
Show answer and explanation
Answer: B. An enlarged ovary with peripheral follicles and a whirlpool (twisted pedicle) sign is the gray-scale picture of torsion. Venous flow is usually lost first; arterial flow often persists.
Why not the others:
- A — Arterial flow can persist in torsion, especially partial or intermittent torsion. Flow doesn't rule it out.
- C — A normal ovary doesn't explain unilateral enlargement, stromal edema, peripheral follicles and a twisted pedicle.
- D — Polycystic morphology doesn't explain acute pain or a twisted pedicle, and it isn't an urgent finding.
Takeaway: Gray-scale findings and symptoms can sustain concern for torsion even when arterial flow is present. Definitive diagnosis is surgical. The outline lists ovarian torsion among findings that need immediate action.
Source: Moro et al., Clinical and ultrasound characteristics of adnexal torsion (2020), results and discussion; SAEM: Ovarian Torsion, “Diagnostic Testing” and “How do I make the diagnosis?”; OB/GYN Examination Content Outline V24.1 (Inteleos).
OBGYN-05 · Domain 1 — Gynecology · Fibroid location (FIGO) (outline 1.B.3)
A leiomyoma in the uterine body is entirely surrounded by myometrium. It doesn't touch the endometrium or the serosa. How is it classified?
Show answer and explanation
Answer: A. In the FIGO system, a type 4 fibroid is entirely surrounded by myometrium, touching neither the endometrium nor the serosa. That's the intramural location.
Why not the others:
- B — Types 0–2 project into the endometrial cavity; type 3 contacts the endometrium without distorting the cavity. This one does neither.
- C — Subserosal fibroids (FIGO types 5–7) contact the serosa. This one doesn't.
- D — Type 8 fibroids lie outside the uterine body, most often in the cervix. This one is in the corpus.
Takeaway: Classify a fibroid by its relationship to the endometrium and serosa. Type 3 is intramural but contacts the endometrium; type 4 contacts neither surface.
Source: FIGO 2018 revisions, Figure 4 and leiomyoma subclassification; FIGO Fibroid Toolbox: Leiomyoma classification systems.
OBGYN-06 · Domain 2 — First trimester · Criteria for early pregnancy loss (outline 2.B.3, 4.C.1)
On transvaginal ultrasound, an intrauterine gestational sac contains an embryo with a crown-rump length (CRL) of 7.4 mm. No cardiac activity is seen despite careful observation. Using the Society of Radiologists in Ultrasound (SRU) criteria, which statement is correct?
Show answer and explanation
Answer: D. Under the SRU criteria for transvaginal scanning, CRL ≥7 mm with no cardiac activity, or mean sac diameter ≥25 mm with no embryo, is diagnostic of early pregnancy loss. The 2024 multisociety lexicon retains these thresholds.
Why not the others:
- A — An embryo under 7 mm with no cardiac activity does not meet this size-based diagnostic criterion. At 7 mm or more with no cardiac activity, it does.
- B — No. The SRU panel set 7 mm as the size at which absent cardiac activity is diagnostic.
- C — A mean sac diameter of 25 mm or more with no embryo is a separate, independent criterion.
Takeaway: Know which findings are diagnostic and which are only concerning. The difference decides whether a pregnancy that could still progress is protected.
OBGYN-07 · Domain 2 — First trimester · Ectopic pregnancy (outline 2.B.2, 4.A.2)
A patient with a positive serum hCG has pelvic pain. Transvaginal ultrasound shows no intrauterine gestational sac. Next to the right ovary, but separate from it, is an inhomogeneous adnexal mass that moves independently of the ovary when gentle transducer pressure is applied. There is a small amount of echogenic free fluid. Which diagnosis fits best?
Show answer and explanation
Answer: B. An extraovarian adnexal mass is the most common ultrasound finding in tubal ectopic pregnancy. Movement separately from the ovary helps confirm the extraovarian location. Without a visible yolk sac or embryo in the mass, the SRU term is probable tubal ectopic pregnancy.
Why not the others:
- A — A corpus luteum is ovarian in origin and moves with the ovary, even when it protrudes from the ovarian surface. This mass slides separately.
- C — That doesn't explain an extraovarian mass. A single hCG value also can't establish location on its own.
- D — OHSS is associated with ovarian stimulation and enlarged ovaries, not a single mass separate from the ovary.
Takeaway: Ask: inside the ovary, or separate from it? Use gentle pressure to find out. Ectopic pregnancy is one of the outline's immediate-action findings.
Source: SRU multisociety first-trimester ultrasound lexicon (2024), “Tubal EP,” pp. 8–10; ASRM: Prevention of moderate and severe ovarian hyperstimulation syndrome (2023 guideline; published 2024), introduction and Table 1.
OBGYN-08 · Domain 2 — First trimester · Chorionicity (outline 2.A.3)
At 12 weeks, a twin pregnancy shows one placental mass. Where the dividing membrane meets the placenta, a triangular wedge of placental tissue extends into the base of the membrane. What does this indicate?
Show answer and explanation
Answer: C. The lambda sign is chorionic tissue extending into the base of the intertwin membrane. It means dichorionic twins, even when the two placentas have fused into one mass.
Why not the others:
- A — Monochorionic diamniotic twins show the T sign: a thin membrane meeting the placenta without a wedge of tissue.
- B — Monoamniotic twins have no dividing membrane at all.
- D — Conjoined twins are fused fetuses. That isn't what this membrane finding describes.
Takeaway: One placental mass doesn't mean one placenta. Determine chorionicity before 13+6 weeks using the intertwin membrane, its placental insertion, membrane thickness and placental masses together.
OBGYN-09 · Domain 3 — Second/third trimester · Placenta previa vs low-lying placenta (outline 3.C.1, 3.A.1)
During a 20-week anatomy scan with an overfilled maternal bladder, a transabdominal image suggests the placenta covers the internal cervical os. What is the best next step?
Show answer and explanation
Answer: A. Transvaginal imaging is more accurate for placental location. Obtain post-void images when previa is suspected.
Why not the others:
- B — An overfilled bladder can make the placenta appear closer to the os than it is. Confirm before labeling.
- C — Under RCOG’s current definition, placenta previa reaches or covers the os; a low-lying placenta has an edge less than 2 cm away without reaching it.
- D — A previa or low-lying placenta seen in the second trimester is documented and rechecked, typically at 32 weeks. It isn't ignored.
Takeaway: Previa reaches or covers the os; low-lying is less than 2 cm away without reaching it. A non-covering edge at least 2 cm away is not low-lying. Measure the edge-to-os distance rather than eyeballing it.
Source: RCOG Green-top Guideline 27a (2026), sections 5.1.1–5.1.2; Quinton et al., Placenta Position (2025), section 7: scanning pitfalls.
OBGYN-10 · Domain 3 — Second/third trimester · Vasa previa (outline 3.C.4, 3.C.6)
At 21 weeks, the umbilical cord inserts into the membranes (velamentous insertion) near a low-lying placental edge. Transvaginal color Doppler shows a vessel within the membranes crossing the internal os that stays fixed when the patient changes position. Pulsed Doppler shows an arterial waveform at the fetal heart rate. What is the most likely diagnosis?
Show answer and explanation
Answer: B. In vasa previa, unprotected fetal vessels running in the membranes lie over or near the internal os. Velamentous cord insertion is a classic risk factor. Transvaginal color and pulsed Doppler help confirm the vessel’s course and fetal origin. A proposed 2 cm threshold is not a universally accepted exclusion boundary.
Why not the others:
- A — Funic presentation is a loop of umbilical cord near the cervix. Here, the vessel is traced within the membranes rather than within a cord loop.
- C — Placenta previa is placental tissue reaching or covering the os, not an isolated vessel crossing it.
- D — Abruption is separation of the placenta with hemorrhage. It doesn't produce a fixed fetal vessel over the os.
Takeaway: When you see a velamentous insertion or a low placenta, look over the internal os with color Doppler.
Source: SMFM Consult Series #37 (2015, reaffirmed 2024); full guideline, pp. 615–617.
OBGYN-11 · Domain 3 — Second/third trimester · Abdominal wall defect (outline 3.B.11)
At 19 weeks, free-floating loops of bowel are seen in the amniotic fluid with no covering membrane. Color Doppler shows the umbilical cord inserting normally into the abdominal wall, with the defect just to the right of the insertion. What is the diagnosis?
Show answer and explanation
Answer: D. Gastroschisis is typically a right paraumbilical, full-thickness defect with no covering membrane and a normal cord insertion. Associated anomalies outside the gastrointestinal tract are uncommon, unlike omphalocele; bowel abnormalities can coexist.
Why not the others:
- A — An omphalocele is a midline defect at the cord base, covered by a membrane, with the cord inserting into the sac.
- B — Even a ruptured omphalocele is centered on the cord insertion. Here the cord inserts normally beside the defect.
- C — A cord cyst is a fluid-filled structure within the cord. It doesn't produce free-floating bowel loops.
Takeaway: Find the cord insertion with color Doppler first. Normal insertion beside the defect means gastroschisis; insertion into a covered sac means omphalocele.
Source: CDC/WHO birth-defects surveillance manual: abdominal wall defects; ISUOG mid-trimester guideline (2022), abdominal wall and spine, pp. 849–850.
OBGYN-12 · Domain 3 — Second/third trimester · Lemon and banana signs (outline 3.B.5, 3.A.14)
At 19 weeks, the axial head view shows inward scalloping of the frontal bones. The transcerebellar view shows a curved cerebellum wrapped around the brainstem, and the cisterna magna is obliterated. What should the sonographer do next?
Show answer and explanation
Answer: C. The lemon sign (frontal scalloping) and banana sign (cerebellum wrapped around the brainstem) are cranial signs of Chiari II malformation, seen in most fetuses with open spina bifida. They can point to a spinal defect that is hard to see directly.
Why not the others:
- A — These are cranial signs of Chiari II malformation, not markers of trisomy 21.
- B — The banana-shaped cerebellum and obliterated cisterna magna make this a pattern that needs further spine assessment, not a finding to dismiss as a normal variant.
- D — Cleft lip isn't what these findings suggest. The spine is the priority.
Takeaway: When the head looks like this, the spine is the answer.
Source: ISUOG fetal CNS guideline, Part 1 (2020), fetal spine and indications for targeted neurosonography; ISUOG mid-trimester guideline (2022), p. 850.
OBGYN-13 · Domain 3 — Second/third trimester · Twin-twin transfusion syndrome (outline 3.B.1, 4.C.13)
A monochorionic diamniotic twin pregnancy at 19 weeks shows a maximum vertical pocket (MVP) of 9.1 cm around twin A, whose bladder is large. Around twin B, the MVP is 1.5 cm, and twin B's bladder is still visible. Both twins are alive, with no hydrops and no critically abnormal umbilical artery, ductus venosus or umbilical vein Doppler findings. Which statement fits best?
Show answer and explanation
Answer: D. Under traditional Quintero criteria, the fluid sequence in a monochorionic diamniotic pregnancy is an MVP of 8 cm or more in the recipient sac and 2 cm or less in the donor sac. A still-visible donor bladder with no critical Doppler changes or hydrops is stage I. This 19-week example also meets the European fluid thresholds; after 20 weeks, that convention uses a recipient pocket of at least 10 cm.
Why not the others:
- A — An MVP of 8 cm or more in one sac with 2 cm or less in the other is the diagnostic polyhydramnios-oligohydramnios sequence, not normal variation.
- B — It's the reverse: TTTS requires a shared (monochorionic) placenta with vascular connections.
- C — TAPS is defined by a Doppler difference in MCA peak velocities, not by this fluid discordance.
Takeaway: Chorionicity first, then the fluid in each sac, then the donor's bladder. Monochorionic twins are scanned serially for exactly this reason.
Source: ISUOG twin-pregnancy guideline (2025), PDF p. 14, diagnosis and Table 1: Quintero staging.
OBGYN-14 · Domain 3 — Second/third trimester · Short cervix (outline 3.D.1, 4.C.15)
At 20 weeks in a singleton pregnancy with no prior spontaneous preterm birth, transvaginal imaging shows a closed cervical length of 18 mm, with funneling at the internal os. Which statement is most accurate?
Show answer and explanation
Answer: A. Cervical length is measured transvaginally along the closed endocervical canal. In a singleton pregnancy without a prior spontaneous preterm birth, SMFM uses a midtrimester length of 25 mm or less to diagnose a short cervix; funneling is another finding to report.
Why not the others:
- B — An 18 mm cervix at 20 weeks is below the short-cervix threshold. Preterm birth risk rises as cervical length falls.
- C — Transvaginal scanning is the standard for measuring cervical length.
- D — A digital exam can't measure the closed cervical length the way transvaginal ultrasound does.
Takeaway: A cervical length plus a gestational age is the finding. 18 mm at 20 weeks is short.
Source: SMFM Consult Series #70 (2024), recommendations 1–2.
OBGYN-15 · Domain 4 — Protocols & procedures · Nuchal translucency technique (outline 4.C.2, 2.B.6)
You are measuring nuchal translucency (NT) using the FMF protocol with conventional B-mode imaging. Which set of conditions is required for a valid measurement?
Show answer and explanation
Answer: C. The FMF NT window is 11+0 to 13+6 weeks, corresponding to a CRL of 45 to 84 mm. Image a midsagittal section with the head and thorax filling the screen, measure the widest part, and place the calipers on the inner borders.
Why not the others:
- A — Too early, wrong plane, and wrong caliper placement. NT requires a CRL of 45–84 mm in a midsagittal view.
- B — Hyperextension falsely increases NT and flexion falsely decreases it. The neck must be neutral.
- D — That describes the nuchal fold, a separate second-trimester measurement (outline 4.C.9).
Takeaway: Don't confuse NT (first trimester) with nuchal fold (15–20 weeks). Both appear on the outline.
Source: Fetal Medicine Foundation USA: Measurement of Nuchal Translucency; ISUOG 11–14-week guideline (2023), p. 135: NT technique; OB/GYN Content Outline V24.1, 4.C.2 and 4.C.9.
OBGYN-16 · Domain 4 — Protocols & procedures · Endometrial thickness with fluid in the cavity (outline 4.B.1)
A sagittal transvaginal image shows fluid in the endometrial cavity separating the two endometrial layers. At the thickest point, the anterior layer measures 2.0 mm, the posterior layer 3.0 mm, and the fluid between them 4.0 mm. What endometrial thickness should be reported?
Show answer and explanation
Answer: B. When fluid separates the layers, measure each endometrial layer and add them, excluding the fluid: 2.0 + 3.0 = 5.0 mm. Without fluid, the thickness is the maximum anteroposterior measurement of the double layer on a long-axis view.
Why not the others:
- A — That's the average of the two layers. The reported thickness is their sum.
- C — That's the fluid alone, which isn't endometrium.
- D — That includes the fluid. ISUOG specifies measuring the two tissue layers and recording their sum.
Takeaway: Measure tissue, not fluid. Interpreting the number comes after measuring it correctly, and depends on the patient's clinical context.
OBGYN-17 · Domain 4 — Protocols & procedures · Biophysical profile scoring (outline 4.C.14, 3.B.3)
During a biophysical profile at 36 weeks, within 30 minutes you see 4 discrete body movements, one 40-second episode of fetal breathing, and one limb extension with return to flexion. The single deepest vertical pocket of amniotic fluid is 1.6 cm. The nonstress test is reactive. What is the score, and what is the key concern?
Show answer and explanation
Answer: A. Each component scores 2 or 0. Breathing needs at least one 30-second episode, movement needs 3 or more discrete movements, and tone needs one extension with return to flexion. The 1.6 cm fluid pocket scores 0. Here: 2 + 2 + 2 + 0 + 2 = 8.
Why not the others:
- B — The fluid pocket is under 2 cm, so amniotic fluid scores 0.
- C — Only one component is abnormal: 2 + 2 + 2 + 0 + 2 = 8.
- D — The other four components score normally, but the low-fluid finding still needs evaluation.
Takeaway: Read the total and the fluid together.
OBGYN-18 · Domain 4 — Protocols & procedures · Polyhydramnios (outline 4.C.13, 3.B.3)
At 32 weeks in a singleton pregnancy, the four-quadrant amniotic fluid index (AFI) measures 27 cm, and the single deepest pocket (SDP) is 9 cm. How should the amniotic fluid be described?
Show answer and explanation
Answer: D. In a singleton pregnancy, polyhydramnios is an AFI of 24 cm or more or an SDP of 8 cm or more. The AFI severity bands are mild at 24.0–29.9 cm, moderate at 30.0–34.9 cm, and severe at 35 cm or more. The 27 cm AFI and 9 cm SDP in this case both fall in the mild range.
Why not the others:
- A — An AFI of 24 cm or more, or an SDP of 8 cm or more, defines polyhydramnios.
- B — That's the opposite end: low fluid, such as an SDP under 2 cm.
- C — Severe starts at an AFI of 35 cm or more, or an SDP of 16 cm or more. These values fall in the mild range.
Takeaway: Idiopathic polyhydramnios is a diagnosis of exclusion, so finding it should prompt a detailed look at fetal anatomy.
Source: SMFM Consult Series #46: Evaluation and management of polyhydramnios (2018, reaffirmed 2024), full guideline, pp. B3–B4.
OBGYN-19 · Domain 4 — Protocols & procedures · Sonohysterography timing (outline 4.D.1)
A 34-year-old with regular menstrual cycles is scheduled for saline infusion sonohysterography to evaluate abnormal bleeding. When should the procedure ideally be done, and what would postpone it?
Show answer and explanation
Answer: B. The ACR–ACOG–AIUM–SRU practice parameter schedules sonohysterography in the follicular phase, after menstrual flow has ceased or nearly ceased and before ovulation (ideally by cycle day 10 with regular cycles). It should not be performed if pregnancy is possible; cycle timing alone does not exclude pregnancy. The 2025 revision also lists active pelvic infection, concern for pelvic inflammatory disease, or an intrauterine device as contraindications. Unexplained pelvic tenderness needs assessment before proceeding.
Why not the others:
- A — Late-cycle timing risks scanning an early pregnancy. The guideline aims for the early follicular phase instead.
- C — The guideline schedules it after flow has essentially ceased. Active bleeding isn't a contraindication but can make interpretation harder.
- D — Pelvic infection or unexplained pelvic tenderness is a reason not to proceed.
Takeaway: Procedure questions test timing, contraindications and documentation, not only anatomy.
Source: AIUM/ACR/ACOG/SRU practice parameter: Sonohysterography and HyCoSy, 2025 revision (published March 2026), “Saline Infusion Sonohysterography—Contraindications” and “Patient Preparation.”
OBGYN-20 · Domain 4 — Protocols & procedures · Reprocessing a transvaginal transducer (outline 4.A, clinical standards)
A transvaginal exam was done with a single-use transducer cover that looks intact afterward. Before the transducer is used on the next patient, what is required?
Show answer and explanation
Answer: C. AIUM requires cleaning and routine high-level disinfection of internal-use transducers between patients, along with a high-quality single-use cover for each exam. Follow the manufacturer's instructions for which disinfection methods are compatible.
Why not the others:
- A — Low-level disinfection is for external transducers on clean, intact skin. Internal transducers need high-level disinfection.
- B — A cover reduces contamination but doesn't replace cleaning and high-level disinfection.
- D — AIUM's requirement is cleaning plus high-level disinfection by a method the transducer's manufacturer approves, not autoclaving.
Takeaway: The type of contact sets the level: intact skin gets low-level disinfection; mucous membranes get high-level disinfection, cover or no cover.
OBGYN-21 · Domain 5 — Physics & instrumentation · MCA Doppler for fetal anemia (outline 5.B.2)
A pregnancy with maternal red-cell alloimmunization is being followed for fetal anemia. Which Doppler approach is used as the primary screen?
Show answer and explanation
Answer: C. SMFM recommends MCA-PSV as the primary noninvasive test for fetal anemia, measured close to the MCA's origin, ideally at a 0° angle. A value above 1.5 multiples of the median (MoM) is a positive screening finding that raises concern for moderate-to-severe anemia; it does not confirm anemia by itself.
Why not the others:
- A — The umbilical artery reflects placental resistance, not fetal anemia.
- B — The test measures peak systolic velocity near the vessel's origin, at as close to 0° as possible.
- D — Uterine artery waveforms assess maternal placental perfusion, not fetal anemia.
Takeaway: Get the angle right: an off-axis angle changes the velocity you record, and the threshold assumes a correct measurement.
Source: SMFM Clinical Guideline #8: The fetus at risk for anemia, p. 697 recommendations and p. 700, “Screening methods.”
OBGYN-22 · Domain 5 — Physics & instrumentation · Umbilical artery Doppler in growth restriction (outline 5.B.4, 3.B.4)
In a fetus with growth restriction at 31 weeks, umbilical artery spectral Doppler shows forward flow in systole and no flow at the end of diastole in every cardiac cycle. What does this finding represent?
Show answer and explanation
Answer: A. SMFM defines an abnormal umbilical artery Doppler as a PI, RI or S/D ratio above the 95th percentile for gestational age, or absent or reversed end-diastolic velocity. In FGR, SMFM recommends delivery at 33–34 weeks for absent and 30–32 weeks for reversed end-diastolic velocity.
Why not the others:
- B — A normal umbilical artery has low resistance with continuous forward flow through diastole.
- C — Reversed flow would cross to the opposite side of the baseline from systolic flow. Here diastolic flow is absent, not reversed.
- D — Fetal anemia is assessed with the MCA peak systolic velocity, not the umbilical artery.
Takeaway: The progression runs from decreased diastolic flow to absent to reversed. Each step is reported because it changes management.
Source: SMFM Consult Series #52: Diagnosis and management of fetal growth restriction (2020, reaffirmed 2024), full guideline, pp. B7–B9, “Umbilical artery Doppler,” and recommendations 16–17.
OBGYN-23 · Domain 5 — Physics & instrumentation · Documenting embryonic heart rate (outline 5.B.1, 5.C.4)
At 8 weeks, you need to document embryonic cardiac activity and heart rate. Which approach follows AIUM's guidance?
Show answer and explanation
Answer: D. AIUM recommends documenting the fetal heart rate with M-mode or B-mode, keeping the TI as low as possible, and not using spectral Doppler for this unless clinically indicated.
Why not the others:
- A — AIUM says spectral Doppler shouldn't be used to document the fetal heart rate unless clinically indicated.
- B — That adds Doppler exposure without adding information. AIUM advises caution with Doppler in the first trimester.
- C — That's the opposite of ALARA: use the lowest output that answers the question.
Takeaway: Pick the mode that answers the question with the least exposure. For this task, AIUM recommends M-mode or B-mode. This isn't a ban on Doppler when there's a clinical reason for it.
Source: AIUM: Prudent use and safety of diagnostic ultrasound in pregnancy (approved 2020); OB/GYN Examination Content Outline V24.1 (Inteleos)
OBGYN-24 · Domain 5 — Physics & instrumentation · Thermal index and ALARA (outline 5.C.4)
During obstetric scanning, which thermal index should you monitor at 8 weeks after the last menstrual period, and which should you monitor after about 10 weeks?
Show answer and explanation
Answer: B. AIUM recommends monitoring TIS up to 10 weeks from the LMP (a CRL of about 33–34 mm) and TIB thereafter. Higher TI values carry shorter recommended maximum dwell times. Pulsed Doppler typically raises TI, so keep its use brief.
Why not the others:
- A — It's the other way around. TIB applies once fetal bone is forming, after about 10 weeks.
- C — Both indices matter. AIUM gives maximum dwell times for TI values in obstetric scanning.
- D — TIC (cranial bone) isn't the index AIUM specifies for obstetric scanning.
Takeaway: ALARA means keeping output and dwell time as low as reasonably achievable while still answering the clinical question.
Source: AIUM: Recommended maximum scanning times for displayed thermal index values (reapproved 2022), Table 1 and its introduction; AIUM: Prudent use and safety of diagnostic ultrasound in pregnancy, “Fetal Heart Rate Evaluation.”
Scoring yourself: Give yourself one point for each correct answer, for a total out of 24. If you stop partway through, record how many you got right, how many you answered, and how many remain. Note the outline code on every miss, move the missed concepts earlier in your plan, and put every miss into the correction log. These small, uneven domain samples identify concepts to review; they don't measure domain readiness or convert to an official scaled score.
Your 6-week OB/GYN study plan
Assumptions: you've finished (or nearly finished) your program's OB/GYN coursework and clinical rotations, and you can give this about 7.5–10 hours a week, as five sessions of roughly 90–120 minutes. That is 30 sessions and 45–60 hours over six weeks. This is Castleport's planning framework, not an ARDMS recommendation, and finishing it doesn't by itself mean you're ready.
Every session follows the same pattern:
- Recall (10 min): With notes closed, write what you remember about today's topic: normal appearance, how it's measured, what the abnormal versions look like.
- Review (50–70 min): Work through the matching outline items with your textbook or course notes. Fill the gaps you just found.
- Practice (20–30 min): Answer questions on the topic. Explain each answer out loud before you check it.
- Log (10 min): Add every miss, and every lucky guess, to your correction log.
| Week | Focus | Outline areas | Sessions | Practice items |
|---|---|---|---|---|
| 1 | Baseline + physics and Doppler | Domain 5 | (1) Download the outline, mark every item you've rarely scanned, and work all 24 questions cold. (2) Instruments: M-mode for embryonic and fetal heart rate, color, power and pulsed-wave Doppler, 3D. (3) Obstetric Doppler: umbilical artery, MCA and ductus venosus waveforms and what changes them. (4) Gynecologic Doppler (ovarian perfusion, uterine varices, AVMs) and ALARA: TIS, TIB and MI. (5) Review the week's log. | OBGYN-21, 22, 23, 24 |
| 2 | Gynecology | 1.A–1.B; 4.B | (1) Uterus, myometrium, endometrial cycle, cervix, adnexa and cul-de-sacs in premenarcheal, reproductive and postmenopausal patients; uterine, ovarian and endometrial measurements. (2) Müllerian anomalies, fluid collections, fibroids, adenomyosis and endometriosis. (3) Endometrial and cervical pathology, postmenopausal bleeding, cesarean scar, IUD location. (4) Functional cysts, benign and malignant ovarian masses, torsion, OHSS, PCOS, pelvic inflammatory disease. (5) Mixed review plus log. | OBGYN-01, 02, 03, 04, 05, 16 |
| 3 | First trimester | 2.A–2.B; 4.C.1–4.C.2 | (1) Structures under 10 weeks: decidual reaction, gestational sac, yolk sac, embryo, amnion; measuring mean sac diameter, CRL and yolk sac. (2) Anatomy at 10–14 weeks, nuchal translucency technique, multiples and chorionicity. (3) Early pregnancy loss, anembryonic pregnancy, abnormal yolk sac, subchorionic hemorrhage, retained products. (4) Ectopic and heterotopic pregnancy, gestational trophoblastic disease, IUD with pregnancy, first-trimester anomalies and aneuploidy markers. (5) Mixed review plus log. | OBGYN-06, 07, 08, 15 |
| 4 | Second/third trimester: normal anatomy and biometry | 3.A; 4.C.3–4.C.15 | (1) Placenta, cord, amniotic fluid (AFI and deepest pocket), lie, presentation and situs. (2) Head: BPD, HC, cisterna magna, transcerebellar diameter, lateral ventricle, cephalic index, nuchal fold at 15–20 weeks. (3) Heart views, thorax and diaphragm. (4) Abdomen, kidneys and renal pelves, skeleton, spine, limbs, genitalia; AC and long bones. (5) Biophysical profile and cervical length, plus log. | OBGYN-14, 17, 18 |
| 5 | Second/third trimester: abnormalities | 3.B–3.D | (1) CNS and spine, face, neck. (2) Heart, thorax, diaphragm, abdominal wall and GI tract. (3) Genitourinary, skeletal and extremity anomalies; growth (FGR, SGA, macrosomia); fluid abnormalities. (4) Placenta and cord: previa, abruption, accreta spectrum, velamentous insertion, vasa previa, single umbilical artery; twin complications; cervical insufficiency; maternal pelvic masses. (5) Mixed review plus log. | OBGYN-09, 10, 11, 12, 13 |
| 6 | Protocols, procedures + timed practice | 4.A, 4.D; everything | (1) Clinical standards: verifying orders, correlating hCG, genetic testing and CA-125, transabdominal vs transvaginal vs translabial technique, and the findings that need immediate action. (2) Procedures: sonohysterography, amniocentesis, CVS, IUD placement, infertility exams, and transducer reprocessing. (3–4) Timed practice blocks at about one question per minute, then re-study your two or three weakest outline areas with new examples. (5) Re-explain all 24 items without the answers, then confirm your appointment, ID and any approved accommodations. | OBGYN-19, 20, then all 24 |
Adapting the plan:
- More time (8–10 weeks): keep the order and spread the 30 sessions over your available weeks. Ten weeks works at three sessions a week. Over eight weeks, use four sessions a week, leaving two extra sessions for recall and weak areas.
- Less time (3–4 weeks): for four weeks, keep Weeks 1 and 6 separate and combine Weeks 2–3 and 4–5. For three weeks, pair Weeks 1–2, 3–4 and 5–6. The full 30 sessions still take 45–60 hours: an average of 11.25–15 hours a week over four weeks, or 15–20 hours over three. Start with the concepts your cold run showed need review. Don't skip gynecology because your job is mostly OB; it's 19% of the exam.
- Retaking after a fail: start from the domains you struggled with and use the 60-day waiting period for the full six-week plan. In 2025, repeat takers passed at a much lower rate than first-time takers (see Common questions), so change how you study, not just how long.
- Same mistake twice: stop adding questions on that topic and add a review session first.
Turn misses into your next study task
A score tells you how many you missed. A correction log tells you why. Use one row for every miss or lucky guess, and come back to each row on the date you set.
| Item or concept | What I concluded | What the evidence actually supports | My next action | Review on |
|---|---|---|---|---|
| OBGYN-09 | Placenta over the os on the TA view means previa | An overfilled bladder can make the placenta look closer; assess the placental edge and internal os transvaginally | Re-explain previa vs low-lying vs not low-lying, including the exactly-2-cm boundary | 3 days later |
| (your next miss) |
You've really fixed a mistake when you can explain the distinction on a different example, not just recognize the answer to the same question. A plain notebook or spreadsheet works fine; nothing here needs an account.
High-yield numbers and criteria
These are widely used criteria from guidelines and teaching references, not exam answers. Institutions and guidelines differ, so learn why each number exists as well as the number.
| Topic | Commonly used criterion | Source |
|---|---|---|
| Endometrial measurement | Thickest double layer on a long-axis view; with fluid in the cavity, add the two layers and leave the fluid out | ISUOG endometrium consensus (2026) |
| Endometrial visualization | If the endometrium cannot be seen clearly throughout the cavity, report it as non-measurable; do not infer a global thickness from one visible segment | ISUOG endometrial consensus 2026, Table 1 statement 9 |
| Fibroid location (FIGO) | Types 0–2 project into the cavity · type 3 is intramural but contacts the endometrium · type 4 contacts neither endometrium nor serosa · types 5–7 contact the serosa · type 8 includes cervical and other locations outside the corpus | FIGO 2018 revisions, Figure 4 |
| Hemorrhagic cyst vs endometrioma | Typical hemorrhagic cyst: reticular pattern or retractile clot, no internal flow · typical endometrioma: homogeneous ground-glass echoes, smooth walls/septa and no internal flow | ACR O-RADS US v2022, Classic Benign Lesions |
| Early pregnancy loss (transvaginal; SRU criteria) | Diagnostic: CRL ≥7 mm with no cardiac activity, or mean sac diameter ≥25 mm with no embryo | SRU multisociety lexicon 2024, “Diagnostic of EPL” |
| Nuchal translucency | FMF: 11+0 to 13+6 weeks (CRL 45–84 mm); midsagittal, neutral neck, inner-border calipers with conventional B-mode | Fetal Medicine Foundation USA |
| Biometry planes | AC: stomach, umbilical vein at the portal sinus, kidneys not visible; ellipse on the outer skin line · BPD: use the caliper method of your reference chart (ISUOG prefers outer-to-outer) | ISUOG mid-trimester guideline 2022, pp. 843–844 |
| Chorionicity | Full lambda (twin-peak) sign = dichorionic · T sign = monochorionic diamniotic; assess before 13+6 weeks using membrane features and placental findings together | ISUOG twin guideline 2025, pp. 2–3 |
| Placental location | RCOG: previa reaches or covers the internal os · Low-lying: edge <2 cm away without reaching the os · A non-covering edge ≥2 cm away is not low-lying; persistent low placentation is reassessed in the third trimester, commonly around 32 weeks | RCOG Green-top 27a (2026), section 5.1 |
| Vasa previa | Unprotected fetal vessels in the membranes over or near the internal os; evaluate their course and fetal origin with transvaginal color and pulsed Doppler. A proposed 2 cm threshold is not a universal exclusion boundary | SMFM Consult #37, pp. 615–617 |
| Short cervix | SMFM: midtrimester transvaginal cervical length ≤25 mm in a singleton pregnancy with no prior spontaneous preterm birth | SMFM Consult #70 (2024) |
| Polyhydramnios (singleton) | AFI ≥24 cm or single deepest pocket ≥8 cm; AFI severity: mild 24.0–29.9 cm, moderate 30.0–34.9 cm, severe ≥35 cm | SMFM Consult #46, full guideline, pp. B3–B4 |
| Biophysical profile | Five components, 2 or 0 each; report the fluid finding as well as the total. In OBGYN-17, a 1.6 cm deepest pocket scores 0 despite an 8/10 total | FIGO, sections 8.1.4–8.1.5 |
| Twin-twin transfusion | Traditional Quintero fluid criteria: monochorionic diamniotic pregnancy, recipient deepest pocket ≥8 cm and donor ≤2 cm. The European convention uses recipient ≥10 cm after 20 weeks | ISUOG twin guideline (2025), PDF p. 14 |
| Fetal anemia screening | MCA peak systolic velocity >1.5 MoM raises concern in an at-risk fetus; measure near the origin at an angle close to 0°. This is a screening finding, not confirmation by itself | SMFM Clinical Guideline #8 |
| Umbilical artery in FGR | Abnormal: PI, RI or S/D ratio >95th percentile for gestational age, or absent/reversed end-diastolic velocity | SMFM Consult #52 |
| Gastroschisis vs omphalocele | Typically right paraumbilical defect, no membrane, normal cord insertion · midline, membrane-covered, cord inserts into the sac | CDC/WHO surveillance manual: abdominal wall defects |
| Sonohysterography timing | Follicular phase, after flow stops or nearly stops and before ovulation; ideally by day 10 with regular cycles. Exclude possible pregnancy; the 2025 revision also lists infection/PID concern or an IUD as contraindications | AIUM/ACR/ACOG/SRU, 2025 revision |
| Transducer reprocessing | Internal transducers: cleaning plus high-level disinfection between patients, even with an intact cover · external on intact skin: low-level | AIUM, 2025 |
| Fetal heart rate | M-mode or B-mode, TI as low as possible; no spectral Doppler unless clinically indicated | AIUM prudent use |
| Thermal index in pregnancy | Monitor TIS up to 10 weeks (CRL about 33–34 mm), TIB after | AIUM |
What the outline covers: a domain checklist
Use this to check your coverage. If you can't explain an item out loud, it goes back into the plan. The full list is in the official outline.
Gynecology (19%).
- Normal: uterus (size, position, orientation, contour, echogenicity), myometrium, endometrium and its cyclic changes, vagina and cervix, both adnexa, anterior and posterior cul-de-sacs, across premenarcheal, reproductive and postmenopausal patients.
- Abnormal: Müllerian anomalies; abnormal fluid collections; leiomyomas; adenomyosis and endometriosis; endometrial and cervical pathology; cesarean-section scar and leiomyosarcoma; functional ovarian cysts; benign and malignant ovarian neoplasms; torsion, hyperstimulation and polycystic ovarian disease; pelvic inflammatory disease; IUCD location.
First trimester (12%).
- Normal: structures under 10 weeks; anatomy at 10–14 weeks; fetal number, chorionicity and amnionicity.
- Abnormal: gestational trophoblastic disease; ectopic and heterotopic pregnancy; embryonic demise; anembryonic pregnancy; abnormal yolk sac; increased nuchal translucency; subchorionic hemorrhage; IUCD with pregnancy; incomplete or missed abortion and retained products; first-trimester anomalies and aneuploidy markers.
Second/third trimester (37%).
- Normal: placenta, cord, amniotic fluid, lie, presentation and situs; cranial anatomy, neck and face; heart; thorax and diaphragm; abdomen and GI tract; genitourinary system; skeleton, spine, extremities and genitalia.
- Fetal abnormalities: abnormal multiples; anomalies and aneuploidy markers; fluid; growth; CNS; neck; face; heart; diaphragm; thorax; abdominal wall; abdomen and GI tract; genitourinary system; skeleton; extremities.
- Placenta and cord: previa; abruption and infarction; accreta, increta and percreta; abnormal insertion or shape including vasa previa; other placental and membrane abnormalities; abnormal cord.
- Cervix and maternal pathology: cervical incompetence (shortening, funneling, cerclage); maternal pelvic pathology.
Protocols and Procedures (24%).
- Clinical standards: verify the order and history; correlate findings with clinical presentation, prior imaging and labs (hCG, genetic testing, CA-125); scanning technique and prep (transabdominal, transvaginal, translabial); findings that need immediate action (ovarian torsion, fetal demise, ectopic pregnancy).
- Measurements: endometrium, uterus and ovaries; CRL, mean sac diameter, yolk sac, NT, BPD, HC, cisterna magna, transcerebellar diameter, lateral ventricle, cephalic index, nuchal fold, AC, long bones, renal pelves, amniotic fluid, biophysical profile, maternal cervix.
- Procedures: sonohysterography, amniocentesis after 15 weeks, CVS, IUD placement, infertility exams and procedures.
Physics and Instrumentation (8%). Pelvic Doppler (ovarian perfusion, uterine varices) and AVMs; embryonic and fetal heart rate and rhythm with M-mode or cine; MCA, ductus venosus and umbilical cord Doppler; M-mode, color, power and pulsed-wave Doppler; 3D imaging; ALARA (thermal and mechanical index).
Hotspot questions and image review
Some OB/GYN items show an image and ask you to click your answer directly on it: a structure, a measurement point or an abnormality. ARDMS has a short video, How to Answer a Hotspot Question, linked from the official OB/GYN page, and the Pearson VUE ARDMS page links the sample testing tutorial for the interface.
The 24 questions above are text-based, so they don't train hotspot clicking. For image-interpretation practice, use images from your training that you're permitted to use (de-identified) or textbook images with the captions covered, and work through the same five prompts every time:
| Prompt | What you write down |
|---|---|
| What am I looking at? | Organ or structure, orientation, view, and gestational age or clinical context |
| Is this image adequate for the task? | The landmarks the view requires, and anything missing or extra (like the kidneys showing in an AC plane) |
| What is actually shown? | A neutral description before any diagnosis: location, internal appearance, relationship to nearby structures |
| What can I conclude? | The supported finding, and what a single image or single measurement can't tell you |
| What would I need next? | The missing view, a prior measurement, or the concept to review, not a guessed diagnosis |
OB/GYN is measurement-heavy, so practice where the calipers go on every image, not just what the structure is. Log every miss in the correction log.
OB/GYN exam at a glance
| Item | Detail |
|---|---|
| Questions and time | Approximately 170 questions in 3 hours: multiple choice and hotspot items. The exam page also lists a five-minute survey (Inteleos OB/GYN page) |
| Pacing | Use about one question per minute as a practice target, then follow the actual on-screen timer on exam day. This is a planning target, not an official time allowance per question. |
| Scoring | Pass/fail on a 300–700 scale; 555 or higher passes. It isn't a percentage correct and isn't graded on a curve, so a practice percentage doesn't convert to a scaled score (Passing standard) |
| Fee | $300 USD, which includes a $100 non-refundable processing fee. Testing outside the U.S., Canada, or Mexico adds a $50 fee (Fee schedule) |
| Credential | OB/GYN counts toward RDMS together with SPI. Pass both within five years of each other, in either order. The window runs by calendar year starting the day after your first pass: pass on June 6, 2026, and you have until December 31, 2031. The rule doesn't apply when you add a specialty to a credential you already hold (5-year rule) |
| Eligibility | You need a qualifying prerequisite pathway (Prerequisites). Applicants also submit an OB/GYN Clinical Verification form, signed by an active RDMS registrant with the OB/GYN specialty or a physician trained to interpret and report OB/GYN ultrasound, confirming directly observed core clinical skills (CV form; Document requirements) |
| Scheduling and tutorial | Book through the Inteleos portal. Pearson VUE delivers the exam and links an ARDMS tutorial of the testing interface (Pearson VUE ARDMS page) |
| Results | Score report at the test center and in your Pearson account; posted to your Inteleos portal within one week (OB/GYN results information) |
| If you don't pass | You can reapply after three days, but you must wait 60 days to retake. The wait can't be waived (Retake and reapply) |
| Accommodations | Request through the official process (Accommodations) |
Fees and policies change. Confirm on the official pages before you apply or pay.
Common questions
How hard is the ARDMS OB/GYN exam? In 2025, 80% of first-time takers passed, 50% of repeat takers passed, and 75% of all takers passed (ARDMS 2025 Global Exam Performance Summary). The report gives percentages only, without candidate counts. The exam page itself still lists 2023 as its latest year (79% first-time, 74% overall).
Should I take SPI or OB/GYN first? Either order counts. Physics feeds into the Doppler and safety questions, so that may influence your study order. What matters is passing both within the five-year window described above.
How long should I study? ARDMS doesn't prescribe a study duration on its exam page. The plan above uses six weeks at 7.5–10 hours a week. Add time for any domain your clinical rotations barely touched, such as gynecology pathology or procedures.
Which free official resources should I use? Use the current content outline to check coverage, the official hotspot explanation for the item format, and the tutorial linked on the Pearson VUE ARDMS page for the testing interface.
What should I do if I don't pass? Use the 60-day wait to run the full six-week plan, starting with the domains that felt weakest on exam day and in your correction log. You can reapply after three days so your eligibility lines up with the end of the wait. If you don't have a current Clinical Verification form on file, you'll need to submit one with the new application.
Are these real ARDMS questions? No. Castleport wrote every question here from the published content outline and cites a clinical or professional source for each answer. These questions do not use recalled, leaked or "dump" content. Sharing or using unauthorized exam content violates the official exam-security policy.
Sources and verification
Official exam sources: Inteleos OB/GYN exam page · OB/GYN Content Outline V24.1 · Exam fee schedule · 5-year rule · Retake and reapply guidelines · 2025 Global Exam Performance Summary · OB/GYN Clinical Verification form · Passing standard · Pearson VUE ARDMS page · Prerequisites · Accommodations
Teaching references are linked beside each practice question and in the high-yield table.
Last verified: October 28, 2026. We checked the official OB/GYN exam page, the Version 24.1 content outline, the fee schedule, the 5-year rule, the retake policy, the passing standard, Pearson VUE's ARDMS page and the 2025 pass-rate summary, along with the teaching references cited on this page.
Castleport uses AI tools in its content-development workflow. AI output isn't treated as a source: every exam fact and answer here links to the source it was checked against. See our editorial standards and how we check sources and practice content, and report an error if you find one.
Castleport Test Prep is an independent exam prep publisher. We are not affiliated with, endorsed by, or approved by ARDMS or Inteleos. Exam and credential names are used to identify their subjects; trademarks belong to their respective owners. All practice questions on this page are original and unofficial. This page is for exam preparation, not clinical guidance.
Castleport Test Prep Editorial Team