目的探讨长期注射国产长效避孕针对月经的影响。方法对连续注射国产长效避孕针避孕5年以上112例育龄妇女,采用问卷调查和体格检查,对使用避孕针前及使用5年以上者的月经情况进行对比分析。结果用药后月经周期缩短,经量减少,经期≥8d比率显著减少,无痛经比率明显增加。结论注射长效避孕针对月经改善情况明显。 Objective To investigate the effect of long-term injection of domestic long-acting contraception on menstruation. Methods A total of 112 reproductive women of childbearing age who were contraceptively injected with long-acting contraceptives for more than 5 years were investigated by questionnaires and physical examinations. The contrastive analysis was conducted on the menstrual situation before contraception and for more than 5 years. Results After menstruation, the menstrual cycle was shortened, the amount of menstruation decreased, the rate of menstruation ≥ 8 days was significantly reduced, and the rate of dysmenorrhea was significantly increased. Conclusion Long-term injection of contraceptives for menstrual improvement is obvious.