Progesterone is a hormone secreted after ovulation that prepares the lining of the uterus for a potential pregnancy. Because of its important role at the beginning of conception and well into pregnancy, there is often a false assumption that low levels of progesterone are responsible for all miscarriages. In this episode, reproductive endocrinologist Dr. Neil Chappell breaks down the role of progesterone, why spot checking for this hormone can be misleading, and when and how to add progesterone therapy if recurrent miscarriage is a concern.