How is NFP any different from the Calendar Method?
The calendar method, or rhythm method, is based entirely on counting days past the first day of the cycle. This method is highly ineffective, especially for women with a variable cycle length. The NFP method is far more comprehensive utilizing far more information. Instead of being based on one piece of information for the entire month, the NFP method is utilizing daily information. The NFP method can be based on over 50 pieces of information if one records temperature, fluid sensation, fluid color, and cervical position on a daily basis.
