Give information about natural methods useful as contraceptive.

Explanation

Oral administration of small doses of either progestogens or progestogen-estrogen combination is taken as pills orally.
Pills have to be taken daily for a period of 21 days starting preferably within the first five days of menstruation. It has to be repeated in the same pattern till the female desires to prevent conception.
After a gap of 7 days (during which menstruation occurs) it has to be repeated in same pattern till the female desire to prevent conception. They inhibits ovulation and implantation as well as after the quality of cervical mucus to prevent / retard entry of sperm.
Saheli is the new oral contraceptive for the females that contains a non steroidal preparation. It is once a week pill with very few side effects and high contraceptive value.
Implants : Progestogens alone or in combination with estrogen can also be used by females as injections or implants under the skin.
Their mode of action is similar to that of pills and their effective periods are much longer.
Administration of progestogens or progestogene - estrogen combination or IUDs within 72 hours of coitus have been found to be very effective as emergency contraceptive as they could be used to avoid possible pregnancy.