MMWR Morb Mortal Wkly Rep. 1991 Jan 4;39(51-52):929-32.
The initiation of sexual intercourse early in life is associated with an increased number of sex partners and a greater risk for sexually transmitted diseases (STDs). This report describes trends in age at first premarital sexual intercourse for adolescent women (15-19 years of age) in the United States during 1970-1988 and indicates an accelerated increase in the proportion having had premarital sex from 1986 to 1988.
早年开始性行为与性伴侣数量增加以及感染性传播疾病（STD）的风险增大有关。本报告描述了1970 - 1988年期间美国15 - 19岁青春期女性首次婚前性行为的年龄趋势，并表明1986年至1988年期间有婚前性行为的比例加速上升。
