The mid-trimester placenta previa: a prospective follow-up.
One hundred and fifty-six mid-trimester sonograms were performed at our prenatal diagnostic unit. Twenty women were found to have a low-lying placenta or placenta previa and were followed by serial ultrasound examinations to observe changes in placental position. Eighty percent of women, i.e., 16/20, with a low-lying placenta had converted to normal implantation by the time of delivery. Most of the conversions had taken place at approx. 34 weeks of gestation. The patients with mid-trimester low-lying placenta had an increased risk of third-trimester bleeding, abruptio placentae and cesarean sections. The infants were also at risk of premature delivery. Patients with mid-trimester low-lying or placenta previa should be followed by ultrasound to monitor delivery.
Ancona
S
S
Department of Obstetrics and Gynecology, Catholic Medical Center of Brooklyn and Queens, New York, NY.
Chatterjee
M
M
Rhee
I
I
Sicurenza
B
B
D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D010923:Placenta Previa / Q000175:diagnosis*; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D011446:Prospective Studies; D014463:Ultrasonography