ARDMS OB/GYN Exam Prep - Pass Guaranteed
Master obstetric and gynecologic sonography with comprehensive prep.
Prepare for the ARDMS OB/GYN specialty exam with Prepry's extensive question bank covering fetal anatomy, biometry, and gynecologic pathology.
SPI Exam Required
To earn your ARDMS credential, you must first pass the Sonography Principles & Instrumentation (SPI) exam. The SPI is a prerequisite for all ARDMS specialty exams.
Official Exam Information
RDMS OB/GYN Specialty
ARDMS • RDMS (OB/GYN)
The RDMS OB/GYN Specialty is an approximately 170-question, 3 hours exam from American Registry for Diagnostic Medical Sonography (ARDMS); a scaled score of 555 is required to pass, and the fee is $300.
~170
Total Questions
3 hours
Exam Duration
180 minutes
$300
Exam Fee
USD
555
Passing Score
Scale: 300-700
| Specification | Detail |
|---|---|
| Exam name | RDMS OB/GYN Specialty |
| Credential awarded | RDMS (OB/GYN) |
| Administered by | American Registry for Diagnostic Medical Sonography (ARDMS) |
| Number of questions | Approximately 170 |
| Time limit | 3 hours (180 minutes) |
| Passing score | 555 (scale: 300-700) |
| Exam fee | $300 USD |
| First-time pass rate | 73% |
Read the full OB/GYN exam guide →
Take the free OB/GYN practice test →
Content Domains
Obstetrics - Second/Third Trimester
Protocols and Procedures
Gynecology - Pelvic Anatomy and Physiology
Obstetrics - First Trimester
Physics and Instrumentation
Retake wait period: 60 days • Max 3 attempts per year
Your Complete Study Kit
Why Students Pass with Prepry
Pass Guarantee
Score 80% or higher on mock exams and move 80% of questions to the Learned column, but don't pass? Get 3 extra months of Prepry Pro, free.
715+ OB/GYN Questions
Comprehensive coverage of obstetric and gynecologic sonography topics.
Video Lessons
Visual guides to fetal anatomy, biometry measurements, and gyn pathology.
125-Question Mock Exam
Full-length practice exam simulating the real ARDMS OB/GYN exam.
Track Your Progress
Monitor performance across OB and GYN topics separately.
Web, iPhone & Android
Study OB/GYN sonography anywhere—on any device.
Expert Video Lessons
Watch 37 ARDMS OB/GYN Exam Prep - Pass Guaranteed video lessons (17.1 hours) taught by credentialed sonographers
Jenna Laquerre
Video InstructorMS, R.T.(R)(ARRT), RDMS (AB, OB/GYN, PS, BR), RVT
Lead Educator and Content Director at Prepry. Experienced sonographer and adjunct instructor at Palm Beach State College with extensive clinical experience across multiple specialties.
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Unit 1 Introduction to Gynecology and Pelvic Anatomy Pt 1
OB/GYN
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Unit 1 Introduction to Gynecology and Pelvic Anatomy Pt 2
OB/GYN
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Unit 2.1 Uterine Anatomy
OB/GYN
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Unit 2.2 Uterine Anatomy
OB/GYN
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Unit 3 Pt. 1 Uterine Pathology
OB/GYN
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Unit 3 Pt. 2 Uterine Pathology
OB/GYN
37
Video Lessons
17.1+
Hours of Content
Expert
Credentialed Instructors
Success Stories
Learners Who Passed Their ARDMS® OB/GYN
“The fetal anatomy questions were incredibly detailed. I felt fully prepared for my exam.”
Sarah M.
RDMS (OB/GYN), New Graduate
“Prepry helped me master biometry measurements and normal values. Passed first try!”
Emily R.
RDMS, Sonography Student
“The gyn pathology section was exactly what I needed. Highly recommend!”
Rachel K.
RDMS (AB)(OB/GYN)
Expert-Created Content
Meet Your Obstetrics and Gynecology (OB/GYN) Team
Our content is created and reviewed by credentialed professionals with real-world clinical experience.
Content Author
Jenna Laquerre
MS, R.T.(R)(ARRT), RDMS (AB, OB/GYN, PS, BR), RVT
AuthorExperienced Educator and Educational Content Developer with a focus on sonography and radiography. With numerous certifications and a strong clinical background, I contribute to professional organizations and publish extensively. Adjunct instructor at Palm Beach State College.
View ProfileContributors
Angel Fernandez
MD
ContributorMedical Doctor and Radiology & Diagnostic Imaging Specialist from Universidad de Los Andes with ten years of clinical experience. Expertise in teleradiology reporting for MRI, CT, Ultrasound, Mammograms, and X-ray examinations. Multilingual medical translator (English, Spanish, Italian) with extensive knowledge in anatomy, physiology, and pathophysiology.
View ProfileMindy Vanderleest
MBA, RDMS, RVT
ContributorReviewers
Shannon Redmon
BS, RDMS (AB, OB, BR), RVT
ReviewerMedical Sonographer at Asheville Radiology Associates.
View ProfileVideo Instructors
Jenna Laquerre
MS, R.T.(R)(ARRT), RDMS (AB, OB/GYN, PS, BR), RVT
VideoLead Educator and Content Director at Prepry. Experienced sonographer and adjunct instructor at Palm Beach State College with extensive clinical experience across multiple specialties.
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Common Questions
Frequently Asked Questions
First, second, and third trimester OB, fetal anatomy, biometry, high-risk pregnancy, gynecologic anatomy, and pathology.
Score 80% or higher on your mock exams and move 80% of questions to the Learned column, but don't pass? We'll give you 3 extra months of Prepry Pro, free.
Yes, the SPI exam is required before taking any ARDMS specialty exam.
Most students study for 6-10 weeks depending on clinical experience.
Yes! Your subscription includes all ultrasound exams.
Yes, Prepry works on web, iPhone, and Android.
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