Abstract
Summary: Oestrogens as postcoital contraception have been prescribed for 282 women at the Brook Advisory Centre (Avon) since January 1973. A daily dose of 50 mg diethylstilboestrol for 5 days started within 72 hr of unprotected intercourse was used from January 1973. This was changed to 5 mg ethinyl oestradiol in May 1974. There were no pregnancies nor any serious side effects. Follow-up showed that most women had their next period at the expected time.