Skip to Content
Home > Health Information > Health Library > Progesterone
Progesterone is a hormone produced in the ovaries during the second half of the menstrual cycle that helps prepare the uterus for pregnancy. Progesterone is also produced by the placenta during pregnancy and helps the placenta function properly.
At the end of pregnancy, a drop in progesterone helps start labor contractions.
When a woman reaches the end of her reproductive years and begins menopause, her level of progesterone declines.
Current as of:
February 19, 2019
Medical Review:Adam Husney, MD - Family Medicine & Anne C. Poinier, MD - Internal Medicine & Martin J. Gabica, MD - Family Medicine & Kathleen Romito, MD - Family Medicine & Carla J. Herman, MD, MPH - Geriatric Medicine
To learn more about Healthwise, visit Healthwise.org.
© 1995-2019 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.
Our interactive Decision Points guide you through making key health decisions by combining medical information with your personal information.
You'll find Decision Points to help you answer questions about:
Get started learning more about your health!
Our Interactive Tools can help you make smart decisions for a healthier life. You'll find personal calculators and tools for health and fitness, lifestyle checkups, and pregnancy.
Feeling under the weather?
Use our interactive symptom checker to evaluate your symptoms and determine appropriate action or treatment.
See important information from Billings Clinic on Non-discrimination and Interpreter Services.
Billings Clinic is proud to be an equal opportunity/affirmative action (EOE/AA) e-verify employer.