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.

Prevention of hypertensive disorders of pregnancy.

A prospective randomised clinical trial comprising 510 pregnant patients was performed to determine whether supplementation with calcium, low-dose aspirin or a combination of calcium and low-dose aspirin can lower the incidence of hypertension in pregnancy. Greatest benefits were obtained with calcium. Perinatal mortality was lowest in the aspirin group.

Obstetric deaths in Trinidad.

We determined the causal pathways of pregnancy-related deaths over a 16-year period. Pregnancy-induced hypertension was the chief contributor to our high maternal mortality rate of 36.9 per 100 000 births.

Caesarean section delivery in Trinidad.

A 7-year retrospective survey was conducted in order to determine local trends in caesarean section rates, maternal outcome and indications for the procedure. The annual rate of caesarean births has not exceeded 10.0% of deliveries.

Vaginal breech delivery and perinatal mortality in twins.

An objective analysis of our clinical experience with the intrapartum management of twin gestations was undertaken in order to determine whether or not routine caesarean section is justified when the first twin presents by the breech. The perinatal mortality rate for breech first twins delivered vaginally was not statistically different from vertex presentations. There was no perinatal loss among babies delivered vaginally by the breech.