Depo-Provera is a birth control method for women, made up of a hormone similar to progesterone and given as an injection by a doctor into the woman’s arm or buttocks.
Each shot provides protection against pregnancy for up to 14 weeks, but the shot must be received once every 12 weeks to remain fully protected. Birth control with Depo-Provera begins immediately after the first shot if given within the first five days of your menstrual period. Depo-Provera is 99% effective in preventing pregnancy and does not prevent spreading of STDs.