How are PMS and PMDD related to depression in women?
As many as three out of every four menstruating women experience premenstrual syndrome or PMS. PMS is a disorder characterized by emotional and physical symptoms that fluctuate in intensity from one menstrual cycle to the next. Women in their 20s or 30s are usually affected. About 3% to 5% of menstruating women experience premenstrual dysphoric disorder, or PMDD. PMDD is a severe form of PMS, marked by highly emotional and physical symptoms that usually become more severe seven to 10 days before the onset of menstruation. In the last decade, these conditions have become recognized as important causes of discomfort and behavioral change in women. While the precise link between PMS, PMDD, and depression is still unclear, chemical changes in the brain and fluctuating hormone levels are both thought to be contributing factors.