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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 ...
Menstruation in synchrony with the moon is widely assumed in myths and traditions as a ritual ideal. [12] [13] The idea that menstruation is—or ideally ought to be—in harmony with wider cosmic rhythms is one of the most tenacious ideas central to the myths and rituals of traditional communities across the world.
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 ...
Menstrual synchrony, also called the McClintock effect, [1] or the Wellesley effect, [2] is a contested process whereby women who begin living together in close proximity would experience their menstrual cycle onsets (the onset of menstruation or menses) becoming more synchronized together in time than when previously living apart. "For example ...
For example, screening for breast cancer can be impacted by where a woman is in her menstrual cycle. “Your breasts may feel more lumpy at certain points of your cycle compared to others,” Teen ...
This is in contrast to our close great ape relative the chimpanzee, whose menstrual cycle length is around 36 days. Knight's point here is that female chimpanzees could not synchronize their cycles with the moon even if they wanted to, whereas human females do seem to possess a strikingly close approximation to the necessary menstrual cycle length.
The women often share a hut so there are usually several people in one hut at a time. Men are never welcome, but younger boys below the age of puberty are allowed, and they cannot even look in the windows. [12] The women must stay outside the village during menstruation, but they are free to wander the forest and surrounding areas.
Menarche (/ m ə ˈ n ɑːr k i / mə-NAR-kee; from Ancient Greek μήν (mēn) 'month' and ἀρχή (arkhē) 'beginning') is the first menstrual cycle, or first menstrual bleeding, in female humans. From both social and medical perspectives, it is often considered the central event of female puberty, as it signals the possibility of fertility.