Combined hormonal birth control methods release estrogen and progestin into the whole body. These hormones prevent pregnancy mainly by stopping ovulation (the release of an egg from one of the ovaries ). They also cause other changes in the body that help prevent pregnancy. The mucus in the cervix thickens, making it hard for sperm to enter the.

Description Contraceptive caps are also called cervical, vault or diaphragm caps. They are barrier contraceptives. The Mother’s Clinic supplied it to women. The clinic opened in 1921. Contraceptive caps sit over the cervix. They act as a barrier to sperm entering the uterus.

Find a Health Center What are the different types of birth control pills? There are 2 types of birth control pills (combination pills and progestin-only pills), and many different brands. Combination Pills (COCs): Combination pills have 2 hormones: estrogen and progestin. Combination pills are the most common type of birth control pill.