birth control

birth control The practice of exercising some level of control over contraception. Birth control methods are many, and they vary in effectiveness. The most effective method is abstinence from sex, followed by oral, injectible, or implanted contraceptives; barrier methods used consistently and with spermicidal gel; and the basal temperature method, if used carefully and consistently. See also barrier method; cervical cap; coitus interruptus; condom; condom, female; contraceptive; contraceptive, emergency; contraceptive, implanted; Depo-Provera; diaphragm; intrauterine device; natural family planning; oral contraceptive.