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OB-1T Study Guide 2026: How to Pass on Your First Attempt

TL;DR
  • The Clinical Case Assessment weights Diagnostic Findings at 36% and Sonographic Findings at 30%, together two-thirds of the scored content.
  • You must pass both the 7-case online assessment and the separate Peer Evaluation; one without the other does not earn the credential.
  • Eligibility requires attesting to at least 25 first-trimester cases, mixing transvaginal and transabdominal scanning, within the past 2 years.
  • Both components must be completed within 90 days of purchase, so line up two peer evaluators before you buy.

What This Credential Actually Is

This guide covers the Point-of-Care Ultrasound (POCUS) Obstetrics/First Trimester Certification, administered by the Point-of-Care Ultrasound Certification Academy, part of Inteleos. On this site it is tracked under the identifier "OB-1T." That label is a site identifier, not an issuer-assigned exam code and not a post-nominal you will be awarded after passing. If you want the full background on the name, our explainer What Is OB-1T Certification? walks through it.

The scope matters. This is the standalone first-trimester clinical certification. It is not OB Essentials, not a second- or third-trimester credential, not the Maternal Fetal Health specialty bundle, and not an RDMS OB/GYN registry exam. Candidates sometimes prepare from the wrong material because the shared issuer pages cover several programs; keep your study anchored to the first-trimester content outline and the Academy handbook.

The credential is delivered online through myPOCUS and its learning management system. Candidates are typically emergency physicians, OB/GYN clinicians, advanced practice providers, and other practicing clinicians who use point-of-care ultrasound to answer a narrow set of urgent questions: Is the pregnancy intrauterine? Is there a heartbeat? Is there free fluid? Is this an ectopic until proven otherwise?

Clear the Eligibility Gate First

Before you spend any time on content review, confirm you can actually qualify. The full breakdown lives in OB-1T Requirements: Eligibility, Prerequisites & How to Qualify, but the essentials are:

  • Professional standing: you must be a healthcare professional in good standing and actively practicing in the relevant clinical area.
  • Case volume: you attest to performing and participating in the interpretation of at least 25 obstetrics/first-trimester POCUS cases within the preceding 2 years.
  • Scan mix: those 25 cases must include a combination of transvaginal and transabdominal scanning. The requirement is a combination within the 25 total, not 25 cases of each approach.
  • POCUS Fundamentals: required unless waived by an SPI examination passed within 5 years or a current qualifying ARDMS or APCA credential.
  • Peer evaluators: at least 2 healthcare-provider peers with an ultrasound clinical background who know your relevant scanning abilities.
Recruit your evaluators early: The peer evaluators are the most common logistical bottleneck because they are outside your control. Your 90-day completion window starts at purchase, and the first 2 completed peer questionnaires determine your peer result. Confirm willingness, and that they understand what the questionnaire asks, before you pay.

Two Components, Both Must Be Passed

The structure is what separates this credential from a typical multiple-choice certification. There are two distinct parts, and passing only one does not earn the certificate.

ComponentWhat It TestsFormat
Clinical Case AssessmentInterpretation and clinical reasoning across 5 weighted domains7 simulated clinical cases with multiple-choice and interactive image-hotspot questions
Peer EvaluationPractical scanning ability as observed by your evaluatorsQuestionnaires completed by peers; first 2 completed determine the result

A note on the "7 cases" figure: it is a case count, not a question count. A fixed total number of questions, a numeric passing mark, and a credential-specific pass rate were not verified in the public sources reviewed, so be skeptical of any site that quotes them confidently. We cover what is and is not known in OB-1T Passing Score and OB-1T Pass Rate: What the Data Shows.

Because the cases are simulated clinical scenarios, you are not recalling isolated facts. You read a short presentation, examine images, click on the relevant structure (the hotspot format), and then answer questions that move from what you see to what it means to what you do. Expect to be asked to locate a gestational sac, identify a yolk sac, recognize free fluid, or decide whether a finding meets a threshold.

The online assessment can be stopped and resumed, and you will sign a confidentiality and nondisclosure agreement. Treat the 90-day window as an access and completion deadline rather than a timed sitting.

Where the Points Live: The Five Domains

The issuer's content outline lists five weighted objectives for the Clinical Case Assessment. These weights total 100% for that assessment only, not for the whole two-component credential. A deeper walkthrough is in OB-1T Exam Domains: Complete Guide to All 5 Content Areas.

DomainWeightWhat It Rewards
Domain 1: Standard POCUS Views7%Knowing which views to obtain and how they are oriented
Domain 2: Anatomical Features23%Identifying normal first-trimester structures
Domain 3: Sonographic Findings30%Describing what is on the screen accurately
Domain 4: Diagnostic Findings36%Turning findings into a diagnosis
Domain 5: OB/First Trimester Pathologies4%Recognizing named pathology categories

Two things stand out. First, Diagnostic Findings and Sonographic Findings together are 66% of the Clinical Case Assessment. Second, Domain 5 is only 4% as a standalone objective, but do not read that as "pathology barely matters." Pathology is the substance of almost every case, so it surfaces constantly inside the Diagnostic and Sonographic domains. The 4% simply reflects how the issuer chose to label a separate objective.

Weight is not the same as difficulty: The smallest domains by percentage can still feel hard because they hinge on precise terminology. If you want a candid take on where candidates struggle, read How Hard Is the OB-1T Exam? before you build your plan.

Mastering Diagnostic Findings (36%)

This is the largest domain, and it is where the cases reward clinical judgment instead of image recognition alone. You will be handed a scenario and a set of findings, then asked to commit to a diagnosis or the next appropriate step.

Domain 4: Diagnostic Findings

The task is synthesis: combine the clinical picture with what the images show and land on the correct category.

  • Distinguish a confirmed intrauterine pregnancy from a pregnancy of unknown location, and know what each does and does not allow you to conclude.
  • Recognize when findings are suspicious but not diagnostic, and when they cross into definitive territory.
  • Connect free fluid, an adnexal finding, and an empty uterus into a coherent ectopic pregnancy workup.
  • Know which findings argue for or against a viable gestation, including the role of cardiac activity.
  • Separate a live early pregnancy from failed pregnancy using the criteria you were taught, not a gut impression.

The most useful habit here is to state your conclusion in terms of certainty. A candidate who says "this is ectopic" when the images only support "pregnancy of unknown location with free fluid" is making the exact error the cases are built to expose.

A worked teaching example

This is an original teaching scenario, not a live exam item. A patient presents with pelvic pain and a positive pregnancy test. Transabdominal imaging shows an empty uterus and a small amount of free fluid in the pouch of Douglas. No definite adnexal mass is seen. The strong answer recognizes that no intrauterine gestation has been demonstrated, the free fluid raises concern, and the finding is not a confirmed ectopic by images alone. The wrong answers tend to overstate (diagnosing ectopic outright) or understate (reassuring the patient because no mass was seen). Practicing that calibration across many presentations is the core of this domain.

Mastering Sonographic Findings (30%)

If Diagnostic Findings asks "what is it," Sonographic Findings asks "what do you see." This domain is about describing the image correctly before interpreting it.

Domain 3: Sonographic Findings

Accurate description is the foundation. Candidates who skip straight to diagnosis often misread the underlying picture.

  • Describe the location, contents, and borders of an intrauterine fluid collection.
  • Recognize the yolk sac, embryo, and cardiac activity and know what each signals.
  • Identify free fluid and describe where it sits.
  • Describe adnexal findings, including a mass separate from the ovary.
  • Use measurement correctly, including crown-rump length and mean sac diameter where relevant.
  • Recognize M-mode tracings of fetal cardiac activity.

M-mode deserves special mention because it appears in both places: as a skill within the case content and as one of the seven Peer Evaluation criteria. Be comfortable explaining why you would use it, what a fetal heart tracing looks like, and why it is preferable to pulsed Doppler in early pregnancy.

Anatomical Features and Standard Views

Together these two domains total 30% of the Clinical Case Assessment, and they are the most forgiving to study because they are largely about knowing normal.

Domain 2: Anatomical Features (23%)

You cannot call something abnormal until you can name what normal looks like at this stage.

  • Uterus, endometrium, cervix, and adnexa, including the ovaries.
  • The gestational sac, yolk sac, and embryo, and the order in which they typically appear.
  • Posterior cul-de-sac (pouch of Douglas) as the dependent space for free fluid.
  • Landmarks that help you confirm a true intrauterine location.
  • Bladder as an acoustic window for transabdominal scanning.

Domain 1: Standard POCUS Views (7%)

Small in weight but foundational to everything else.

  • Sagittal and transverse views of the uterus, and why both are needed.
  • Probe orientation conventions and how they differ between transabdominal and transvaginal approaches.
  • Appropriate use of gain and depth to avoid missing or misreading structures.
  • Adnexal and cul-de-sac views for fluid and masses.

Because the peer evaluation also scores Views, Gain, and Depth, this is an area where hands-on practice pays double: it supports the case assessment and the practical evaluation at once.

Pathology Categories You Must Keep Distinct

The issuer's published examples of first-trimester pathology are non-exhaustive, so treat them as a floor rather than a ceiling. They include:

  • Early pregnancy and possible pregnancy
  • Single and multiple intrauterine gestation
  • Ectopic pregnancy and heterotopic pregnancy
  • Molar pregnancy
  • Possible pregnancy failure and definitive pregnancy failure
  • Incomplete abortion and complete abortion
  • Ovarian torsion
Do not collapse the loss categories: The issuer lists possible pregnancy failure and definitive pregnancy failure as separate categories, and also lists complete and incomplete abortion separately. A common teaching shortcut lumps these together as "miscarriage." On this credential, that shortcut costs you. Learn what distinguishes "suspicious but not yet diagnostic" from "diagnostic," and what distinguishes retained tissue from a completed passage.

Heterotopic pregnancy deserves extra attention. It is uncommon in the general population, so candidates under-prepare, but its defining feature (an intrauterine gestation alongside an ectopic one) is exactly the kind of thing that makes "I found the intrauterine pregnancy, so I'm done" a dangerous stopping point. Practice scanning past the first reassuring finding.

Preparing for the Peer Evaluation

The Peer Evaluation is a separate assessment of practical ability, built on 7 evenly weighted criteria:

  1. Diagnostic Quality
  2. Gain
  3. Depth
  4. Views
  5. Measurement
  6. Pathology
  7. M-Mode

These criteria do not add a sixth domain to the case assessment; they sit in the separate peer component. Because evaluators are rating what they have actually seen you do, the best preparation is deliberate practice in the weeks before the assessment, not cramming.

  • Scan with your evaluators present when possible so their observations reflect your current skill.
  • Practice acquiring a clean image on the first attempt, with appropriate gain and depth, rather than relying on repeated adjustments.
  • Rehearse taking a crown-rump length and mean sac diameter measurement, and be able to explain where you place calipers.
  • Capture an M-mode tracing of cardiac activity routinely, not only when asked.
  • Be ready to identify and discuss pathology you encounter in real patients.

Note that clinical video submissions shown on the shared outline apply only to specialty certification enrollment, not to this standalone clinical certification.

A Four-Week Sequence Built Around the Weights

Rather than a generic template, sequence your preparation so the heaviest and most skill-dependent material gets the most repetition. Adjust the pacing to your case volume and your 90-day window.

Week 1

Normal anatomy and standard views

  • Cover Anatomical Features (23%) and Standard POCUS Views (7%) first; everything else depends on recognizing normal.
  • Review the progression from gestational sac to yolk sac to embryo.
  • Practice probe orientation for both transabdominal and transvaginal approaches.
Week 2

Describing what you see

  • Work through Sonographic Findings (30%): fluid collections, free fluid, adnexal findings.
  • Drill measurement and M-mode technique, since both feed the Peer Evaluation.
  • Use image-hotspot practice to build the habit of locating the structure precisely.
Week 3

Diagnosis and certainty

  • Spend the most time here on Diagnostic Findings (36%).
  • Practice stating conclusions at the right level of certainty.
  • Run cases that separate possible from definitive pregnancy failure and complete from incomplete abortion.
Week 4

Integration and peer readiness

  • Work full simulated cases that blend all five domains.
  • Review molar, heterotopic, and torsion presentations you may have seen less often.
  • Confirm your peer evaluators have completed or are scheduled to complete their questionnaires.

For a compressed final review, our OB-1T Cheat Sheet condenses the must-know facts onto one page, and the OB-1T Study Guide hub links the rest of the series. When you want realistic case-style repetition, the OB-1T practice tests are built around this same domain structure.

Fees, Windows, and Retake Rules

Knowing the mechanics prevents expensive surprises. The standard clinical certification fee is USD 150, and eligible-country reductions are offered. If you also need POCUS Fundamentals, that is a separate USD 125, bringing combined initial issuer fees to USD 275 only when both must be purchased, excluding optional courses. A full breakdown is in OB-1T Certification Cost: Complete Pricing Breakdown.

ItemDetail
Clinical certification feeUSD 150 (reductions for eligible countries)
POCUS Fundamentals (if required)USD 125
Combined initial fees (both needed)USD 275, excluding optional courses
Completion window90 days from purchase for both components
Attempts before waiting period2 total content-specific attempts, then a 1-year wait
Wait after an unsuccessful attempt30 days
Retake applicationApply within 90 days of failure; fee amount not verified

One retake detail works in your favor: any component you initially passed is retained for the first retake application. If you pass the case assessment but not the peer component, you do not have to repeat the cases. The 90-day window is an access-and-completion period, not a timed sitting, so use it deliberately. Scheduling specifics are covered in OB-1T Exam Dates: Testing Windows, Deadlines & Scheduling.

After You Pass: Validity and Renewal

The certification is valid for 5 years. Clinical renewal at that point requires an active-practice and good-standing attestation, the relevant knowledge check, and USD 50. Specialty-only professional-development points do not apply to this individual clinical certification.

A common point of confusion involves POCUS Fundamentals. The Fundamentals credential does not expire, but program policy separately requires you to earn your first content-specific certificate within 3 years of Fundamentals or reapply for Fundamentals. That is a progression restriction, not a 3-year expiry of Fundamentals itself, and it no longer applies once you have earned and appropriately maintained a content-specific certificate. If you intend to take Fundamentals first, plan your content-specific attempt inside that window.

On the career side, this credential documents point-of-care competency in a defined clinical area; it does not carry a published, credential-specific pay increase. For a role-based view of how first-trimester POCUS skills fit into emergency, OB/GYN, and advanced practice work, see the OB-1T ROI analysis, the salary guide, and our overview of OB-1T jobs.

Key Takeaway

Do not treat this as a pure memorization exam. Build skill in describing images and committing to diagnoses at the correct level of certainty, line up your peer evaluators before you pay, and spend the most review time on Diagnostic Findings and Sonographic Findings, which together carry 66% of the Clinical Case Assessment.

Frequently Asked Questions

How many questions are on the OB-1T assessment?

A fixed total question count was not verified in public sources. What is documented is that the Clinical Case Assessment uses 7 simulated clinical cases, with multiple-choice and interactive image-hotspot questions. The "7" is a case count, not a question count.

Do I need to scan both transvaginally and transabdominally?

Your 25 attested cases must include a combination of transvaginal and transabdominal scanning. The requirement is a mix within the 25 total, not 25 cases of each approach.

What is the passing score?

A numeric passing mark was not verified in the public sources reviewed, so none is stated here. What is clear is that you must pass both the Clinical Case Assessment and the Peer Evaluation. See our passing score guide for what is and is not confirmed.

What happens if I fail one component?

You may retake after a 30-day wait by submitting a retake application and fee, and you must apply within 90 days of the failure. A component you initially passed is retained for the first retake application. After 2 total attempts, a 1-year waiting period applies.

How long is the certification valid and what does renewal cost?

It is valid for 5 years. Renewal requires an active-practice and good-standing attestation, the relevant knowledge check, and USD 50.

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