近年来 ,由于性传播疾病 ( STD)尤其是艾滋病( AIDS)的发病率逐年上升 ,人们越来越清楚地认识到STD感染的危险性和预防 STD的重要性。STD和计划外妊娠均为缺乏保护性性交的后果。因此 ,人们在选择避孕方法时 ,不仅希望能有良好的避孕效果 ,而且希望能对 STD有预防作用。本文对 In recent years, as the incidence of STDs, especially AIDS, has been increasing year by year, people are becoming more aware of the risk of STD infection and the importance of preventing STD. Both STD and unplanned pregnancies are the consequence of lack of protective intercourse. Therefore, when people choose the method of contraception, they hope not only to have a good contraceptive effect but also to have a preventive effect on STD. This article right