A 27-year-old G2P1 at 32 weeks presents with mild dark vaginal bleeding and occasional contractions. On speculum examination, the cervix is 2 cm dilated with a visible marginal sinus bleed. No placental tissue is seen in the cervical os. The most likely diagnosis is:

• A Complete placenta previa
• B Abruptio placentae
• C Marginal placenta previa ✓
• D Show (bloody show)

Explanation

Marginal placenta previa presents with painless mild bleeding at the internal os margin without tissue covering the os. Complete placenta previa would show tissue covering the os. Abruptio is painful and presents with dark blood and uterine tenderness. Show occurs at term with mucus, not at 32 weeks with sinus bleeding.

Reference: Williams Obstetrics, 26th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.