Natural Family Planning (NFP) is something that has been around the centuries. Evidence shows people have been using this form of family planning for more than 2,000 years, and it is possible it could have been a long time prior to that.
In the traditional sense natural family planning simple involves a man withdrawing his penis prior ejaculation during sexual intercourse, and pulling it away from the area of a woman vagina. This prevents semen from entering the vagina therefore preventing the possibility of pregnancy. The official name for this is Coitus Interruptus. It is the earliest known form of family planning or contraception, having been used way before more modern forms of contraception had been thought of. People believed that simply preventing semen from entering the vagina would prevent pregnancy, something that proved to be correct.
