Family, personal, and social factors associated with the non-use of contraceptive methods during the first sexual experience in adolescent women.

Unplanned pregnancy and sexually transmitted infections (STIs) in adolescents continue to be major health problems around the world. They are associated with sex that occurs without contraceptive protection. We determined the relationship of family, personal, and social factors with the non-use of any contraceptive method during the first sexual experience in 1409 adolescent women. The most significant risk factors were being less than 15 years of age and lacking knowledge and awareness about contraceptive methods. In the family environment, the risk factors were living in an incomplete family and the existence of a poor relationship among the father, the mother, and the adolescents. Socialization with friends who became sexually active at an early age was also associated with having sex for the first time without protection. This information should be used in sexual and reproductive education programmes to prevent unplanned pregnancy and STIs in adolescent women.