Your period is just one part of a four-phase cycle that affects your mood, energy and even your mental clarity all month long ...

PEOPLE staff writer Alex Ross, 24, shares her story of living with endometriosis to raise awareness and help other young ...

This endometriosis awareness month, four women speak candidly about the impact of endometriosis on their health, their sex ...

Menstruation is a fact of life. But painful periods don’t have to be. Cramping and bloating may not indicate a serious health ...

Knixteen is the “little sister brand” to period apparel company Knix. A top performer in the Good Housekeeping Institute ...

What animal has the longest gestation period? From salamanders to elephants, here's how long it can take to make a baby.

He added: "These are signs of something bigger that's going wrong, like hormonal imbalances that can result in things like ...

American women are so reliant on dulling their pain that they may be missing essential information from their body. But ...

If pain is a message telling us to rest, or hydrate, or attend to any of our other survival needs, why are we so dead set on ...

Menstrual cramps, bloating, and headaches can make even the simplest daily activities feel overwhelming. Many people rely on over-the-counter pain medications to manage these symptoms, but using them ...

This 'silent disease' plagued these women's lives for decades. One woman lost her dream job. For another, the diagnosis came ...

According to Margo Harrison, the 1911 invention of Midol was the last time a new period pain product hit the market.