Premenstrual syndrome

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Premenstrual syndrome

Premenstrual syndrome (PMS) involves symptoms that occur in relation to the menstrual cycle and which interfere with the woman's life. The symptoms usually begin 5 to 11 days before the start of menstruation. Symptoms usually stop when menstruation begins, or shortly thereafter.

See also premenstrual dysphoric disorder (PMDD).

An exact cause of PMS has not been identified. However, it may be related to social, cultural, biological, and psychological factors. PMS can occur with apparently normal ovarian function (regular ovulatory cycles).

PMS is estimated to affect up to 75% of women during their childbearing years.

It occurs more often in women between their late 20s and early 40s, those with at least one child, those with a family history of a major depression disorder, or women with a past medical history of either postpartum depression or an affective mood disorder.

As many as 50-60% of women with severe PMS have an underlying psychiatric disorder.

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