Craving, cramps and crying - every woman knows the experience of having her period and the rollercoaster she experiences during her menstrual cycle. Over roughly 28 days from when periods first begin in a lifetime - an average age of 12 - until a woman reaches - an average age of 51 - she will undergo four stages of a menstrual cycle: The menstrual, follicular, ovulatory and luteal phases.During each, the rise and fall of hormones triggers the body to undergo multiple biological processes, such as releasing an egg and causing the uterine lining to thicken to prepare the body to conceive and carry a fetus.
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