A 30-year-old G2P1 at 32 weeks presents with painless vaginal bleeding. Ultrasound shows the placental edge reaching but not covering the internal cervical os. What is the correct classification of this placenta previa?
- A Complete placenta previa
- B Partial placenta previa
- C Marginal placenta previa ✓
- D Low-lying placenta
Correct answer: C. Marginal placenta previa
Explanation
Marginal placenta previa is defined as the placental edge reaching the internal os but not covering it. Complete previa covers the os fully; partial previa partially covers it. Low-lying placenta lies within 2 cm of the os but does not reach it. This distinction guides delivery planning.
Reference: Williams Obstetrics, 26th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.