NFP is a special kind of loving, of caring, of sharing. If a couple is fully informed on the details of NFP, and if they work together, it can be as effective as other methods of family planning. For most people, natural family planning methods are easy to use, and reliable. They're free from disadvantages like possible physical and emotional side-effects that can go with other methods. They can be used to achieve a pregnancy as well as avoid one.
Women are infertile for most of the time during the reproductive phase of their lives.
In fact, there are only a few days in each menstrual cycle in which a woman can conceive. A woman using natural family planning can detect which days she is fertile and which days she is infertile. So if a couple wish to avoid a pregnancy, they know which days to avoid intercourse. No, natural family planning relies on the ability of a woman to be aware of signs of fertility regardless of the length or regularity of the cycle. Ovulation means the release of an egg from the ovary.