NFP is a general title that refers to the natural, scientific and moral methods to achieve or postpone pregnancy. With each different method of NFP, a couple observes specific biomarkers, such as mucus quality, hormonal shifts, temperature and other symptoms that indicate a woman’s fertility. Studies show that NFP is 97-99% effective, which is just as effective, if not more, than medical contraception. There are a variety of NFP methods, each suited for different women and situations. It is good to do your own research when choosing a method of NFP to determine what is best for you.