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Essay Galaxy - Female Menstruation
Puberty - The arrival of the monthly friend.
The principle sign that a girl has become sexually mature and is capable of reproduction is the onset of menstruation, a period of cyclic bleeding from the vagina. (Smith 1997, pg 217) This is one of the key physiological functions of the female body. An ovarian, or estrus, cycle is characteristic of all female mammals, but menstruation, periodic uterine bleeding that accompanies the ovarian cycle, occurs only in women, female apes, and some monkeys.
The average length of the menstrual cycle is twenty-eight days, although somewhat shorter and longer cycles are quite common. The day that bleeding starts is counted as the first day of a given cycle. The menstrual cycle is controlled by mechanisms involving hormones released by the hypothalamus, the pituitary, and the ovaries. The cycle has four stages: the menstrual ....
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Number Of Pages: 3 |
Number Of Words: 594 |
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