01/08/2026
Birth control pills, also known as oral contraceptives, are one of the most common and effective methods of preventing pregnancy. They contain hormones—either a combination of estrogen and progestin or progestin alone—that work by stopping ovulation. Without ovulation, there is no egg released for fertilization, which prevents pregnancy.
In addition to preventing ovulation, birth control pills also thicken cervical mucus, making it harder for s***m to reach the egg. They can also thin the lining of the uterus, reducing the chances of implantation. When taken consistently and correctly, the pill is over 99% effective at preventing pregnancy, though typical use places effectiveness closer to 91%.
Beyond contraception, many women use birth control pills to help regulate menstrual cycles, reduce cramps, manage acne, and lower the risk of certain cancers.