progestin vs. progesterone

progestin vs. progesterone: What's the difference?

Progestin and progesterone are both hormones that serve the same purpose. Progesterone, found naturally in the human body, is best known for preparing the uterus for a fertilized ovary and maintaining a pregnancy. Progestin is a lab-created substance that has the same effects as progesterone and is used for medical purposes such as birth control or hormone replacement therapy.