Contraceptive pills :
Contraceptive pills are also called birth control pills. Contraceptive pills are used to control the pregnancy. There are two different kinds of contraceptive pills such as progestin-only pills and combination pills. There is also a morning-after pill that can be taken in emergency situations to prevent unwanted pregnancy. These contraceptive pills are 99% effective in preventing pregnancy. There are some hormones composed in contraceptive pills which help in stopping or reducing ovulation. Also, these pills create a barrier by forming thick cervical mucus, which helps in the prevention of sperm from entering the uterus. This contraceptive forms a thin lining of the uterus in order to prevent the fertilized ovum from implanting in the wall of the uterus. Contraceptive pills are not effective when there is the use of other medications, such as medications to treat seizures, medicines to treat HIV infection and herbal supplements.