Hormones are the body’s chemical messengers. They act on various tissues and organs in the body to change their behavior. For example, the hormone prolactin stimulates the production of breastmilk.

Hormone levels fluctuate like the tides, ebbing and flowing according to carefully orchestrated cycles. These hormones not only influence the body, but can cross into the brain and shape the behavior ...

A new study finds male mice more unpredictable than females, challenging century-old assumptions used to exclude females from research because of their hormones. By Azeen Ghorayshi For decades, male ...

A common artificial sweetener found in thousands of foods may threaten male fertility by disrupting hormones and damaging sperm, new research in rats reveals. Study: Exposure to Sucralose and Its ...