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[Prolonged pregnancy. Risks in pregnancy duration over 294 days and obstetric consequences].

A total of 73 postterm pregnancies (greater than or equal to 294 days gestational age) were studied retrospectively and showed the following results: the frequency of postterm pregnancies was 1.5%. Compared to a control group of normal pregnancies (262-293 days), there was no evidence of a higher risk for infants born after term. As far as the different routes of delivery are concerned, there was a slightly higher number of cesarean sections and a markedly higher number of surgical vaginal deliveries in postterm pregnancies.