[The location of the placenta in pregnant women with one or more past cesarean sections].

We examined 282 pregnant women who have had one or more previous cesarean sections. The localization of placenta was done with ultrasound after 32 weeks of gestation. The control group consists of 1560 pregnant women without previous operative births. Placenta praevia is found in 3.9% in patients with previous cesarean sections and in 0.45% in the control group. The bleeding in the group of placenta praevia after previous operative births is observed in 44.4% against 28.5% when the placenta praevia is in intact uterus. A significant dependence was found between the number of sections and the risk of placenta praevia and bleedings in the following pregnancy. Placenta praevia shows preference to the anterior uterine wall in 67% in scared uterus and in 33% in intact uterus. A very poor is the combination of febrile postoperative period with endometritis and very short interval to the next pregnancy. These conclusions are important for the prognosis and management of such pregnancies.