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Premenstrual syndrome (PMS) is a disruptive set of emotional and physical symptoms that regularly occur in the one to two weeks before the start of each menstrual period. [4] [5] Symptoms resolve around the time menstrual bleeding begins. [4]
When the first birth control pill was being developed, the researchers were aware that they could use the contraceptive to space menstrual periods up to 90 days apart, but they settled on a 28-day cycle that would mimic a natural menstrual cycle and produce monthly periods. The intention behind this decision was the hope of the inventor, John ...
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 ...
First, let's back up a little: There's a medical term for the age when you got your first period—menarche. Girls have started getting their first period earlier than in the past, so now it's ...
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Lack of a menses by the age of 16 where secondary sexual characteristics have developed or by the age of 14 where no secondary sexual characteristics have developed (primary amenorrhea), or lack of a menses for more than 3–6 months after first menstruation cycle. [2] Although missing a period is the main sign, other symptoms can include ...
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Menstrual cycle The menstrual cycle is a series of natural changes in hormone production and the structures of the uterus and ovaries of the female reproductive system that makes pregnancy possible. The ovarian cycle controls the production and release of eggs and the cyclic release of estrogen and progesterone. The uterine cycle governs the preparation and maintenance of the lining of the ...