Did you know your body is full of chemical messengers that help regulate your various organs and body systems? There are at least 50 such chemicals, called hormones, in the human body. Their levels ...

Progesterone is part of hormone replacement therapy (HRT) for people who have been through menopause and still have a uterus. Possible side effects include spotting, headaches, and breast tenderness.

Menopause brings a lot of change, and it’s normal to feel uncertain about what’s happening in your body. Two of the most important hormone players in this transition are estrogen and progesterone.

Once again I am extremely lucky to have this article co-written by a senior graduate student who's an expert on how reproductive hormones act on the brain. Stephanie Koebele is completing her Ph.D.

Female hormones can suppress pain by making immune cells near the spinal cord produce opioids, a new study has found. This stops pain signals before they get to the brain. The discovery could help ...

As opioid overdose deaths in the U.S. rose dramatically from 2014 to today, both Philadelphia, Pennsylvania, and Camden, New Jersey, cemented reputations as hotspots of the crisis. In Philadelphia, ...

This article was reviewed by Julia Switzer, MD, FACOG. Key Takeaways: Estrogen and progesterone are complementary reproductive hormones. Estrogen shapes everything from puberty to menstrual cycles to ...