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.

The female body runs on a well-balanced combination of hormones. Estrogen regulates the menstrual cycle and ovulation. Meanwhile, progesterone prepares the body for a potential pregnancy by thickening ...

While you read this article, your body is busy at work: Chemicals are being secreted from glands, organs, and tissues, sending messages that direct your body to react in certain ways. These chemicals, ...