NFP International is the only organization in the United States that teaches the Triple Strand. What is the Triple Strand of NFP?
The classic content of the Triple Strand consists of three concepts. We have taught these concepts since 1971.
1. Ecological breastfeeding as a distinct form of natural baby spacing. It has now been further standardized as the Seven Standards of eco-breastfeeding.
2. The covenant theology, which is more completely stated as the renewal-of-the-marriage-covenant theology.
3. An open-to-choice version of the Sympto-Thermal Method of systematic NFP oriented to reducing abstinence as much as possible according to the evidence. We teach all the common signs and we teach rules that attempt to maximize the benefits and minimize the limitations of each of the signs. That’s why we teach a rule that allows us to see the start on Peak Day + 2 when the temperature sign is very strong. Other rules require three or four days of mucus drying past Peak Day.
John F. Kippley
Sex and the Marriage Covenant
Battle-Scarred: Justice Can Be Elusive (memoirs)
Natural Family Planning: The Complete Approach