The Billings Method: Controlling Fertility without Drugs or Devices

A totally natural birth control alternative to artificial methods. An effective program for pinpointing fertility to become pregnant. Can be used by any woman, at any age, whether she has regular or irregular periods, is breastfeeding, or approaching menopause. Clinically proven, and tested by the World Health Organization. Used by millions of women in more than 100 countries all over the world.