Obstetric hazards of maternal obesity.

To test the hypothesis that obesity represents a risk factor in pregnancy, we conducted a prospective case-control study to determine whether or not there was any divergence in the obstetric outcome among 132 obese women from that in a control group of 136 non-obese patients. Obese mothers had an increased incidence of pregnancy-induced hypertension and gestational diabetes but there was no significant difference in the duration of pregnancy or in the frequency of low Apgar score at 1 minute. The favourable fetal outcome in obese parturients reflects an increased awareness of the possible medical and obstetric complications and an early recourse to abdominal delivery.