A Centers for Disease Control survey of women, aged 15 to 44, indicates that the frequency of premarital sexual intercourse among teenage girls. A Centers for Disease Control survey of women, aged 15 to 44, indicates that the frequency of premarital sexual intercourse among teenage girls has increased substantially since According to the subjects' reports, the percentage of girls 15 to 19 years old who had had intercourse rose from 29 in to 52 in Among 15 year olds, the percentage rose from 5 to 26; among 19 year olds, it rose from 48 to The gap between whites and blacks has narrowed: in , 51 percent of white adolescent girls and 59 percent of black adolescent girls reported having had premarital sex. The earlier the subject began sexual intercourse, the more likely she was to report multiple sexual partners.
Over Half of U.S. Teens Have Had Sexual Intercourse by Age 18, New Report Shows
5. Teenagers and sex | Growing Up in Australia
One hundred and one pregnant girls aged under 18 years were interviewed to collect information about the development of their sexual awareness, attitudes towards relationships, and about their social context. The data show that the girls were likely to come from homes where the parents were divorced, where the mother married when she was under 21 years of age, and where her first child was conceived out of wedlock. Altogether 76 of these pregnant girls first had intercourse before they were 16 years old. The younger the girl at first intercourse the sooner it occurred in the relationship and for almost half of the girls first intercourse was unplanned. Although almost half used contraception on the first occasion, only one third of the girls used contraceptives regularly.
NEJM Journal Watch
As young people move from early to late adolescence, they develop both physically and psychologically, which also includes their sexual development. During this time, teens experience and explore different feelings and behaviours as aspects of their sexual growth. At this time, teenagers receive different information from parents, peers, social media and the internet about sex.
Kathleen A. Early initiation of sexual activity is associated with more sexual partners, not using condoms, teen pregnancy, and sexually transmitted infection STI during adolescence. Most adolescents initiate sexual activity during high school. The percentage of students who had ever had sexual intercourse did not change significantly during —