How Does the Birth Control Shot Work?
Like other methods of birth control, the birth control shot releases a hormone progestin into the body. Hormones are chemicals made in our bodies. They control how different parts of our bodies work. The progestin in the shot works by keeping a womans ovaries from releasing eggs ovulation. Pregnancy cannot happen if there is no egg to join with sperm. The progestin in the shot also prevents pregnancy by thickening a womans cervical mucus. The mucus blocks sperm and keeps it from joining with an egg. The hormone also thins the lining of the uterus. In theory, this could prevent pregnancy by keeping a fertilized egg from attaching to the uterus. +- How Effective Is the Birth Control Shot? Effectiveness is an important and common concern when choosing a birth control method. The birth control shot is one of the most effective methods of birth control available. It works best when you get the birth control shot regularly, every 12 weeks. • Less than 1 out of 100 women will get pregnant eac
