Natural family planning is a method that teaches you when you can have sex without contraception and with a lesser risk of getting pregnant. This is a natural method in which a woman needs to track her period cycles on a calendar. Women, using this method generally monitor their cervical fluid and take their basal body temperature daily to find out when they are most fertile (thus have greater chance of becoming pregnant) and avoid intercourse during their fertile period.
Pros: This method is completely natural and without side-effects and interaction to the body.
Cons: This method fails to be effective if monitoring is not diligent and accurate.