Abstract: Objective：To explore the relationship between the Norplant removal and the placed age and time. Methods：The reasons for the Norplant removal, and the constituent ratios of the reasons to removed-age and to placed-time, were analyzed in 1 056 cases in our Institution from January 1994 to December 2014. Results： In those 1 056 cases of Norplant removal, 539 cases were due to expiration, 395 cases were due to abnormal uterine bleeding, 97 cases were due to other discomfort beside menstruation, 23 cases were due to planned pregnancy or switch to other contraception, and 2 cases were due to contraceptive failure. The constituent ratio of the removed reasons showed significant difference in the different removed-age groups （P＜0.05）, but did not show significant difference in the placed-time groups （P＞0.05）. The constituent ratios of abnormal uterine bleeding，headache，acne and other symptoms, showed statistical difference in the removal age and implant time groups （P＜0.05）, while those ratios did not show significant difference in the planned pregnancy or switch to other contraception groups （P＜0.05）. Conclusions： Norplant is a long-acting, simple and efficient contraceptive method. The abnormal uterine bleeding, headache, acne and other symptoms are the main reasons of Norplant removal in different age and implant time groups.

Key words: Intrauterine devices, Contraception, Levonorgestrel, Menstruation disturbances