The synthetic hormones in Alyacen change how your body prepares for pregnancy every month. To put it bluntly, they shut the pregnancy party down.
How? In three ways. The big one is by blocking ovulation, which is when your body releases an egg that can then be fertilized. The second is by stopping the lining of your uterus from growing thicker. Normally, it would do this so that it’s more comfortable for the egg to embed there and grow. A thinner monthly lining is what gives you the lighter, shorter period you’ll experience with hormonal birth control. And the third way is pretty cool, too: Alyacen straight up blocks sperm from swimming to the egg by making the mucus in your cervix thicker. Combined, these three methods make it very, very unlikely you’ll become pregnant.