Nine women will become pregnant with perfect use of the calendar method . Pregnancy rates generally are higher for single women who use these methods. Neither periodic abstinence nor FAMs provide protection against sexually transmitted infections. There are no medical or hormonal side effects. Calendars, thermometers, and charts are easy to get.
Most religious groups accept periodic abstinence.
Illness or even lack of sleep can cause false temperature signals. Vaginal infections or use of vaginal products or medication may alter cervical mucus. You and your partner may be tempted to take risks during your fertile period. THEY COST Classes may be free of charge at some family health, family planning, and church-affiliated centers. Charts are carried by family planning clinics.