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The worldwide average age of menarche is very difficult to estimate accurately, and it varies significantly by geographical region, race, ethnicity and other characteristics, and occurs mostly during a span of ages from 8 to 16, with a small percentage of girls having menarche by age 10, and the vast majority having it by the time they were 14. [3]
The first period, a point in time known as menarche, usually begins between the ages of 11 and 13. [1] Menstruation starting as young as 8 years would still be considered normal. [ 2 ] The average age of the first period is generally later in the developing world , and earlier in the developed world . [ 3 ]
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 ...
A study of a population of French women from 1670 and 1789 shows that those who married at age 20–24 had 7.0 children on average and 3.7% remained childless. Women who married at age 25–29 years had a mean of 5.7 children and 5.0% remained childless. Women who married at 30–34 years had a mean of 4.0 children and 8.2% remained childless. [20]
In 2010, Time included Are You There God? It's Me, Margaret. in its All-Time 100 Novels written in English since 1923. The magazine wrote, "Blume turned millions of pre-teens into readers. She did it by asking the right questions—and avoiding pat, easy answers." [12] Scholastic selected the novel for its 100 Greatest Books for Kids/100 Must ...
Primary amenorrhoea is the absence of menstruation in a woman by the age of 16. [11] Females who have not reached menarche at 14 and who have no signs of secondary sexual characteristics (thelarche or pubarche) are also considered to have primary amenorrhea. [12]
an excerpt of the book Your Best Year Yet! by Jinny S. Ditzler This document is a 35-page excerpt, including the Welcome chapter of the book and Part 1: The Principles of Best Year Yet – three hours to change your life First published by HarperCollins in 1994 and by Warner Books in 1998
Most girls get their first menstrual cycle between 12 and 13 years old, according to The American College of Obstetricians and Gynecologists. The age of menstruation onset is slightly younger for Black girls due to health disparities, increased material hardship, and levels of stress. For Black girls, the first moon party is a rite of passage ...