Comparing NFP methods

There is no single NFP method. Several well-established approaches exist, each with its own observations, charting system and teaching model. All of them are morally acceptable ways of living periodic continence (CCC 2370). The best method for your marriage is the one you will actually learn well and use consistently, and that fits your body, your season of life and your temperaments as a couple.

The main methods

• The Billings Ovulation Method relies on the woman's observation of the sensation and appearance of cervical mucus at the vulva throughout the day. It uses a small set of rules and needs no equipment, which makes it accessible in many settings.
• The Creighton Model FertilityCare System is also mucus based, with a very standardized way of describing and recording observations. It is closely linked with a medical approach that uses charts to evaluate gynecological and fertility problems, discussed in a later lesson.
• Sympto-thermal methods combine several signs, usually cervical mucus and basal body temperature, and sometimes changes in the cervix itself. Using more than one sign allows each to cross-check the other.
• The Marquette Method adds a home hormone monitor that measures estrogen and LH in morning urine, often alongside mucus or temperature. Many couples find it helpful when cycles are hard to read, after childbirth or approaching menopause. It involves the ongoing cost of test strips.