In the simplest explanation, birth control and all its methods are based on either preventing a man’s sperm from reaching and entering a woman’s egg — a process called fertilization, or by preventing the fertilized egg from implanting into the woman’s uterus and grow. Among all methods known possible, only abstinence is considered to be 100% effective.
Natural birth control is considered as natural since these methods are non-mechanical and non-hormonal in nature. They are not barrier methods that kill the sperm or prevent it from reaching the egg. Adding to this, they do not involve the use of hormones. Instead, natural birth control requires a man and a woman to not have sexual intercourse during the time when the egg is available to be fertilized by the sperm.
On the average, eggs are released about 14 plus or minus 2 days before a woman’s next monthly period. But since the egg survives for up to 4 days, and the sperm can live for up to 72 hours, the actual time in which a woman may become pregnant is measured not in hours or days, but in weeks. Several natural birth control methods are made, depending on which the woman is...