Menstruation - Wikipedia - Vagina menstruasi
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Menstruation, also known as a period or monthly, is the regular discharge of blood and mucosal tissue (known as menses) from the inner lining of the uterus through the vagina. Menstruation, or period, is normal vaginal bleeding that occurs as part of a woman's monthly cycle. The menstrual blood is partly blood and partly tissue from inside the uterus. Premenstrual syndrome, or PMS, is a group of symptoms that start before the period.