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Placenta praevia: significance in the second trimester
Radiology
|May 1, 1979
Summary
Most posterior placenta previa diagnosed in the second trimester resolves by term. However, a small percentage persist, highlighting the need for continued monitoring of placenta previa cases.
Area of Science:
- Obstetrics and Gynecology
- Maternal-Fetal Medicine
Background:
- Placenta previa, a condition where the placenta partially or completely covers the cervix, can pose risks during pregnancy.
- Second-trimester diagnosis of placenta previa requires understanding its resolution rate to manage patient expectations and clinical care.
Purpose of the Study:
- To determine the risk of second-trimester placenta previa persisting until term.
- To analyze the association between placental implantation site (anterior vs. posterior) and resolution rates.
Main Methods:
- Prospective study involving 98 patients with second-trimester placenta previa.
- Scoring the presence and degree of anterior or posterior placental implantation.
- Follow-up data collected at delivery for 58 patients.
Main Results:
- A higher proportion (63.8%) of second-trimester placenta previa cases were implanted posteriorly.
- The overall incidence of second-trimester placenta previa persisting until term was 8.8%.
Conclusions:
- Posterior implantation may be more common in second-trimester placenta previa.
- A low but significant risk exists for placenta previa diagnosed in the second trimester to persist until term, necessitating careful follow-up.