List and explain in brief three methods of contraception.

The three methods of contraception are:

i. Mechanical barrier - For example condoms on penis and similar covering on vagina serve to block the sperm and does not allow it to reach the egg.

ii. Pills - These act by changing the hormonal balance of the body so that eggs are not released and fertilisation cannot occur. These drugs commonly need to be taken orally as pills.They can cause side-effects.

iii. Contraceptive devices - Like the loop or the copper-T are placed in the uterus to prevent pregnancy. They too can cause side effects due to irritation of the uterus.