Postterm Pregnancy

Abstract

Postterm pregnancy is defined as pregnancy that lasts 42 weeks (294 days) or more from the first day of the last menstrual period. Overall incidence varies between 4 and 19%. The incidence may vary by population, as a result of management practice differences for postterm pregnancies. Accurate determination of gestational age using last menstrual date and earliest ultrasound is essential for accurate diagnosis and management. Fetal, neonatal and maternal complications associated with this condition have always been underestimated. Fetal complications involve oligohydramnios, fetal macrosomia and increased fetal asphyxia during labour. Maternal complications include increased maternal anxiety and operative interference. Management strategies are antepartum surveillance and induction of labour.