A 35-year-old G4P3 at 28 weeks presents with painless vaginal bleeding. Ultrasound shows the placenta covering the internal os. She has a history of two previous cesarean sections. The risk of placenta accreta in this patient is approximately:
- A 3%
- B 11%
- C 40% ✓
- D 67%
Correct answer: C. 40%
Explanation
The risk of placenta accreta increases dramatically with the number of prior cesarean sections and presence of placenta previa. With one prior cesarean and placenta previa, risk is about 3%. With two prior cesareans and placenta previa, risk rises to approximately 40%. With three prior cesareans and placenta previa, risk is about 67%.
Reference: Williams Obstetrics, 26th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.