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Resolution of complete placenta previa: does prior cesarean delivery matter?
Ann K Lal1, Jessica Nyholm, Joseph Wax
1Department of Obstetrics and Gynecology, Mayo Clinic College of Medicine, 200 First St SW, Rochester, MN 55905, USA.
Summary
Women with complete placenta previa diagnosed in the second trimester and a history of cesarean delivery show lower rates of resolution. This finding highlights potential risks for those with prior cesarean sections.
Area of Science:
- Obstetrics and Gynecology
- Maternal-Fetal Medicine
- Diagnostic Ultrasound
Background:
- Complete placenta previa diagnosed in the second trimester is a condition requiring careful monitoring.
- Previous cesarean delivery is a known risk factor for various pregnancy complications.
Purpose of the Study:
- To prospectively evaluate the resolution rate of complete placenta previa diagnosed in the second trimester.
- To compare resolution rates between patients with and without a history of cesarean delivery.
Main Methods:
- Prospective study conducted at three institutions.
- Follow-up sonography every 4–6 weeks until previa resolution or delivery.
- Inclusion of patients with complete placenta previa diagnosed during second-trimester screening.
Main Results:
- Resolution occurred in 61% of patients with prior cesarean delivery versus 90% without (P = .012).
- Placental location (anterior/posterior) did not significantly impact resolution (P = .22).
- Persistence to delivery was noted in 56% of prior cesarean patients with anterior previa.
Conclusions:
- Prior cesarean delivery is associated with a significantly lower likelihood of complete placenta previa resolution.
- This suggests increased vigilance and potentially different management strategies for pregnant individuals with both conditions.
