A 29-year-old woman at 36 weeks presents with painless vaginal bleeding. Transvaginal ultrasound shows the placental edge 1.5 cm from the internal os. There is no evidence of placental invasion. According to the FIGO classification, this is best described as:

• A Complete placenta previa
• B Marginal placenta previa
• C Partial placenta previa
• D Low-lying placenta ✓

Explanation

FIGO 2018 classifies low-lying placenta as placental edge within 20 mm of the internal os but not covering it. Marginal previa is when the edge reaches the os. Partial previa covers the os partially when closed. Complete previa covers the os entirely. D distance of 1.5 cm (15 mm) places this in the low-lying category, not previa.

Reference: Williams Obstetrics, 26th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.