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TORONTO -- Women whose first babies are delivered by cesarean section face an elevated risk of placenta previa and placental abruption in their second pregnancies. And with two previous cesarean deliveries the risk of placenta previa is increased further in the third pregnancy, according to a study by Dr. Darios Getahun of the Robert Wood Johnson Medical School in New Brunswick, N.J., and his colleagues.
The study, which was recently published (Obstet. Gynecol. 2006;107:771-8), was presented as a poster at the annual meeting of the Society for Gynecologic Investigation.
"Although cesarean section has previously been reported as a risk factor for placenta previa, it has not been previously associated with abruption," Dr. Getahun said in an interview at the meeting. "Cesarean section causes scarring of the uterine wall, with the result that placentation may not be optimal. That's why it may be leading to abruption," he explained.
The study included a cohort of women from the Missouri longitudinally linked live birth and fetal death data files. Singleton births were analyzed for 156,475 women whose first two consecutive ...
Source: HighBeam Research, C-section increases later risk of placenta previa.(Obstetrics)