Add Yahoo as a preferred source to see more of our stories on Google. Some people say they're 'allergic to their period.' Here's what to know about the autoimmune skin condition that causes it.

AUSTIN, Texas--Some women with menstrual cycle disorders like asthma and migraine headaches may be experiencing allergies to their own estrogen and progesterone hormones, Texas researchers have ...

Progesterone is a hormone that supports menstruation and pregnancy. It typically rises during pregnancy and while using some birth control medications. Low levels can affect menstruation and fertility ...