Long-term observation by defined criteria of 121 women who had undergone conisation gave 56 pregnancies in 49 patients. The pregnancy rate established, with due consideration of contraception, other causes of sterility, and sexual activity, was about 75 per cent. Twenty-five deliveries were analysed. Forty per cent of them were premature births, with some of the newborns being of extremely low birth weight, which supported the conclusion that pregnancies following conisation should be given high-risk rating and, generally, lead to hospitalisation of the women concerned.