How do the artificial hormones in birth control pills work?
Birth control pills, like Yasmin or Alesse, contain artificial estrogen and/or progestin that copy the hormones your body produces. Your body then reacts to these heightened levels of hormones in different ways, all of which can prevent pregnancy. The primary way the artificial hormones in the pill work is by suppressing ovulation. They also work to thicken your cervical mucus thereby creating a hostile environment for sperm. Both of these methods help to prevent fertilization.
