Birth control, or contraception, is the use of any method, medicine, or device to prevent pregnancy. While there is no perfect method of...

An intrauterine device (IUD) is a small device shaped like a T that is introduced into the uterus to prevent pregnancy. It is one of the...

As mentioned in this post, progesterone and estrogen are key hormones in the menstrual cycle. Hormonal contraceptives use progestin (the...