A 26-year-old woman at 10 weeks gestation presents with minimal vaginal bleeding and mild cramping. The cervical os is closed. Transvaginal ultrasound shows a viable intrauterine pregnancy with fetal cardiac activity. What is the diagnosis?
- A Inevitable abortion
- B Missed abortion
- C Threatened abortion ✓
- D Incomplete abortion
Correct answer: C. Threatened abortion
Explanation
Threatened abortion is diagnosed when there is vaginal bleeding before 20 weeks with a closed cervical os and confirmed fetal cardiac activity. The pregnancy is viable and the os is not dilated, distinguishing it from inevitable abortion (open os) and incomplete abortion (retained products with open os). Missed abortion would show no cardiac activity. The closed os with viable pregnancy is the defining feature.
Reference: Williams Obstetrics, 26th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.