搜索结果: 1-1 共查到“计划生育学 Metropolitan Men”相关记录1条 . 查询时间(0.057 秒)
Understanding Changes in Sexual Activity Among Young Metropolitan Men:1979-1995
Sexual Activity 1979-1995 Metropolitan Men sexually transmitted diseases
2009/9/14
Context: Changes in the sexual behavior of teenagers can have a significant impact on levels of adolescent pregnancy and transmission of sexually transmitted diseases (STDs). Understanding the role pl...