The pill is a type of hormonal birth control that contains synthetic versions of both estrogen and progestin. These hormones disrupt the body's natural cycle, which prevents pregnancy. However ...
Get detailed information on Estrogen and Progestin ... Various combinations of these hormones are referred to as oral contraceptives or birth-control pills. They prevent the release of eggs ...
in the same way the hormones provided by the placenta halt the female cycle during pregnancy. Women using birth control pills must remember to take one each day. Synthetic estrogen and progestin ...