At Klinik Raden Saleh, Department of Obstetrics and Gynaecology, University of Indonesia, from 1 May until 31 August, 1981, Norplant® contraceptive implants were inserted into 437 Indonesian women. The continuation rates of Norplant® at first, second, third, fourth and fifth year were, respectively, 96%, 92%, 88%, 82% and 78%. Bleeding problems were the most common cause for removal. The cumulative five-year net pregnancy rate for Norplant®was 1.8 per 100 women. The Norplant® contraceptive system is thus seen to combine the highest acceptability as measured by its continuation rate with the highest long-term effectiveness among the available temporary contraceptive methods.