Behavioral methods, also known as periodic abstinence methods, or natural methods, are based on avoiding vaginal sex during the fertile period of the cycle. These methods prevent pregnancy by preventing the sperm from meeting with the egg. To this end, the woman avoids intercourse with vaginal penetration during the fertile period.
In every menstrual cycle a woman has a period when having sex can result in a pregnancy, known as the fertile period. The fertile period lasts six days, including the day of ovulation and the previous five days. As a result, fertility awareness methods work by predicting fertile days in each cycle so that a woman avoids intercourse on those days and thus prevents pregnancy.
According Freud, life instincts are those which deal with basic survival, reproduction and pleasure. There are instincts essential for the continuation of species as well as sustaining the life of the individual. Libido is the energy the life instincts create.
