Billings Ovulation Method (BOM) is based on a woman’s daily observations of her cervical fluid or mucus. A woman notes the sensation of cervical fluid at the vulva to determine if she may be fertile. Throughout a woman’s cycle, four simple rules are applied (three prior to ovulation and the fourth rule after the fertile phase ends). These rules are applied based on a couple’s desire to achieve or postpone pregnancy. Women should attend classes or receive instruction from a trained educator to ensure accuracy in using the method to achieve or postpone pregnancy.
Creighton Model (CrM) is a comprehensive method for tracking a woman’s fertility by allowing her to objectively classify her cervical fluid or mucus observations throughout her cycle. Couples learn to observe and record the quality and quantity of the woman’s cervical fluid in a standardized and systematic way and can time intercourse to either avoid or achieve pregnancy. In addition, the CrM chart serves as a tool for evaluating and monitoring a woman’s reproductive and gynecologic health through the new science of Natural Procreative (NaPro) Technology. Women or couples should attend classes or receive instruction from a trained educator to ensure accuracy in using the method to achieve or postpone pregnancy.
Two Day Method is based on daily observations of cervical secretions as an indicator of fertility. A woman using the TwoDay Method checks for cervical secretions at least twice a day. She considers herself fertile if she notices secretions of any type, color or consistency either “today” or “yesterday.” This simple, yet effective method may be taught in a brief office visit.