A type of hormonal contraceptive, administered once every twelve weeks via an injection. Depo-Provera contains a substance similar to progesterone, a female sex hormone. It prevents eggs from implanting in the uterus, thereby preventing pregnancy.

While Depo-Provera is 99 percent effective as a contraceptive, it does not offer any protection against sexually transmitted infections. It can cause some side effects including vaginal dryness and menstrual cycle irregularities.

It is completely reversible – if a woman stops receiving Depo-Provera treatments, she can safely carry out a normal pregnancy within about 14 weeks of her last injection.