Outcome of pregnancy following induced abortion. Report from the joint study of the Royal College of General Practitioners and the Royal College of Obstetricians and Gynaecologists.

A total of 1590 general practitioners and 795 gynaecologists in England, Scotland and Wales are participating in a long-term, prospective study concerning the sequelae of induced abortion. In the present report a comparison is made between the outcome of the first post-index pregnancy in 745 women whose index pregnancy ended in an induced abortion (cases) and that in 1339 women who had an unplanned index pregnancy but were not referred for induced abortion (controls). There were no statistically significant differences between cases and controls. The increased relative risk which was found amongst the induced abortion group of non-viable outcome, low birthweight and shortened gestation, could have arisen by chance. Further analysis of a larger number of pregnancies is required to permit confident interpretation of these observations. The present data provide no reason for alterations in the current management of induced abortion, or the subsequent pregnancy.