Premenstrual Syndrome (PMS) is defined as a combination of abnormal symptoms that occur predictably just before a menstrual period and can interfere with aspects of life. Up to 75 percent of women are thought to be affected by PMS symptoms, which start before a period and improve when bleeding begins. A severe variety of PMS is called Premenstrual Dysphoric Disorder (PMDD), which affects 3 to 8...
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