RDMS-OB-GYN Exam Information and Outline
Registered Diagnostic Medical Sonographer - Obstetrics & Gynecology (OB/GYN)
Syllabus Update Checked on: November 12, 2026
RDMS-OB-GYN Exam Syllabus & Study Guide
Before you start practicing with our exam simulator, it is essential to understand the
official RDMS-OB-GYN exam objectives. This course outline serves as your roadmap.
The information below reflects the 2026 syllabus defined by
APCA.
Below are complete topics detail with latest syllabus and course outline, that will help you good knowledge about exam objectives and topics that you have to prepare. These contents are covered in questions and answers pool of exam.
- Exam Format
- Approx. 170 multiple-choice and hotspot questions; 3 hours
- RDMS credential also requires passing the SPI examination
- Gynecology
- Normal pelvic anatomy and menstrual cycle physiology
- Uterine pathology: fibroids, adenomyosis, endometrial abnormalities, congenital anomalies
- Ovarian pathology: cysts, torsion, neoplasms, PCOS
- Pelvic inflammatory disease and post-menopausal findings
- Infertility evaluation and IUD localization
- First Trimester
- Normal early pregnancy and dating; embryonic structures
- Ectopic pregnancy, pregnancy failure and molar pregnancy
- Nuchal translucency and early anomalies
- Second and Third Trimester
- Fetal biometry and growth assessment
- Fetal anatomy survey and congenital anomalies
- Placenta, umbilical cord and amniotic fluid
- Biophysical profile and fetal Doppler
- Multiple gestations
- Maternal complications: cervical insufficiency, placenta previa, accreta
- Clinical Data Integration and Patient Care
- Laboratory values (hCG, AFP), genetic screening and risk factors
- Documentation, protocols and communication of critical findings
- Procedures and Technique
- Transabdominal, transvaginal and translabial techniques
- Guidance for amniocentesis and CVS