Males born by cesarean section examined 18 years after delivery

Forty-seven boys born by cesarean section in 1962-63 were re-examined 18 years afterwards, at the military medical draft board. No significant increase in mortality or morbidity was found. The mean general intelligence was significantly lower when placenta praevia had been the reason for abdominal delivery. In these cases the infants had had a lower birthweight and placental weight, on average, than the other subgroups.