Typical, or actual, failure rates for the sympto-thermal and calendar methods are not provided by Hatcher and are from J Kippley, The Effectiveness of Natural Family Planning , Couple to Couple League, Cincinnati, OH, 1986. Annual rates for Norplant span the 5 year use period. Failure rates for abstinence are for comparison only and are not from published studies. All methods of birth control can fail, even if used perfectly. Babies are precious, but an unplanned pregnancy can create stress and turmoil.
Sex makes babies.
Discuss the possiblity of pregnancy with your partner before becoming sexually active.