Family planning educational programs offer a list of artificial contraceptive methods to couples wishing to avoid a pregnancy; however, many of these methods have disadvantages: many lead to negative individual and environmental health outcomes, do not promote a sense of fertility awareness in women and men, may be culturally incompatible with certain religious beliefs and worldviews, and do not take into account the full extent of family planning, which includes the ability to achieve as well as to avoid a pregnancy. Natural Family Planning (NFP) is a true method of family planning in that it offers to the couple the option to achieve as well as avoid a pregnancy. NFP methods holistically approach fertility by taking into account the woman's unique fertility cycle and patterns, the need for the couple to understand complex fertility issues, and the needs and family planning intentions of the couple as a whole. This thesis utilizes Evidence Based Practice in an effort to search the best literature regarding the effectiveness of Natural Family Planning methods to avoid a pregnancy, in comparison to the effectiveness of artificial contraceptive methods to avoid a pregnancy. If effectiveness rates are similar, it is reasonable for the health care profession to consider Natural Family Planning as a valid and reliable family planning method, to move towards further research on its effectiveness and benefits, and to implement a practice change by including it in family planning client education programs.