The Billings Ovulation Method® is a natural and non-invasive method of family planning that is simple, affordable, and highly effective. First developed by Drs. John and Evelyn Billings in the 1950s, the Billings Ovulation Method® is founded on rigorous scientific research and has been supported by more than 50 years of medical research with optimum results. The method relies on observations of a woman's cycle to recognize patterns of fertility and infertility and enables her to better understand her body without the negative side effects of external contraceptive devices or drugs. It is applicable in all circumstances and stages of reproductive life, including during breastfeeding, periods of irregular cycles, or approaching menopause. The Toronto Natural Family Planning Association supports women and couples by empowering them with a better understanding of their fertility health.