Like many other pregnancy issues, it's all about hormone changes.

Hormone changes, such as those during the teenage years and pregnancy, probably play a role.

Menopause is a normal process of hormone change and doesn't require treatment.

The hormone changes can occur over a lifetime, not only in pregnancy.

Infection, genes, and hormone changes may be linked to the disease.

This is linked in part to hormone changes in the body.

She's expecting our first child, and the hormone changes are pretty brutal.

These hormone changes weren't accounted for by their sleep quality, stress levels, or time budgeting.

The chart shows hormone changes during a normal menstrual cycle.

Stress tends to be a common trigger, especially when combined with rapid hormone changes later in life.