Data are for the U.S.
- Percent of never-married teens ages 15-19 who have ever had sexual intercourse: Females 42.6%, Males 41.8%
Women 15-44 years
- Average age at first menstrual period for women 15-44 years: 12.5
- Percent of women 15-44 years who have ever been treated for pelvic inflammatory disease (PID): 4.2%
Source: Key Statistics from the National Survey of Family Growth (data are for 2006-2010)