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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]
Fewer than 10% of U.S. girls start to menstruate before 11 years of age, and 90% of all U.S. girls are menstruating by 13.8 years of age, with a median age of 12.4 years. This age at menarche is not much different (0.3 years earlier) than that reported for U.S. girls in 1973.
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The average age of the first period is generally later in the developing world, and earlier in the developed world. [3] The typical length of time between the first day of one period and the first day of the next is 21 to 45 days in young women. In adults, the range is between 21 and 35 days with the average being 28 days.
Luu explains that “knowing the first day of your last menstrual period is generally about tracking your menstrual cycles and understanding what is normal for you.
When her 11-year-old daughter got her period for the first time this past January, Jade Powell leapt into mom mode. She offered supplies, and words of support. And a couple of days later, she ...
Put your cell phones away – unless you are using to record the conversation -- and use these 20 questions as jumping off points to get to know your dad better. Even if you think you know the ...
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