ABSTRACT
Contraception A woman’s life expectancy is inversely proportional to the number of pregnancies she has. At least 50% of pregnancies in the United States are unintended. Contraceptive methods include hormonal, intrauterine, barrier, chemical, or physiologic approaches. None are 100% effective, and all are associated with some degree of risk. However, nearly all contraceptive methods are safer than carrying a pregnancy to term.
