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Menstruation (also called menstrual bleeding, menses or a period) is the first and most evident phase of the uterine cycle and first occurs at puberty. Called menarche, the first period occurs at the age of around twelve or thirteen years. [8] The average age is generally later in the developing world and earlier in the developed world. [42]
Diagram illustrating how the uterus lining builds up and breaks down during the menstrual cycle Menstruation (also known as a period, among other colloquial terms) is the regular discharge of blood and mucosal tissue from the inner lining of the uterus through the vagina. The menstrual cycle is characterized by the rise and fall of hormones. Menstruation is triggered by falling progesterone ...
Constitutional scanty menstruation is perhaps best explained by assuming the presence of an unusual arrangement, or relative insensitivity, of the endometrial vascular apparatus. Reduced menstrual flow is a common side-effect of hormonal contraception methods, such as oral contraceptive pills, IUDs that release hormones (such as Mirena ), or ...
There’s nothing more annoying than being caught unawares by Aunt Flo—so when your body and your period tracker aren’t in agreement and bleeding happens sooner than expected, it’s only ...
Jacobson explains, “During the first two years of menarche (the age of a woman’s first menstrual period), the positive feedback response to estrogen, which allows ovulation, can cause ...
Bleeding may occur frequently or infrequently, and can occur between periods, after sexual intercourse, and after menopause. Bleeding during pregnancy is excluded. [12] Hypomenorrhea is abnormally light menstrual bleeding. [13] Menorrhagia (meno = prolonged, rrhagia = excessive flow/discharge) is an abnormally heavy and prolonged menstrual ...