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menarche

American  
[muh-nahr-kee, me-] / məˈnɑr ki, mɛ- /

noun

Physiology.
  1. the first menstrual period; the establishment of menstruation.


menarche British  
/ mɛˈnɑːkɪ /

noun

  1. the first occurrence of menstruation in a woman's life

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

menarche Scientific  
/ mə-när′kē /
  1. The first menstrual period.


Other Word Forms


Etymology

Origin of menarche

1895–1900; men- + archḗ beginning


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Villarreal: There was so much openness that there was a menarche playlist curated by director Mike Barker.

From Los Angeles Times ● Aug. 13, 2026

Among participants born from 1950-1969, the average age at menarche was 12.5 years, and the rates of early and very early menarche were 8.6% and 0.6%, respectively.

From Science Daily ● May 29, 2024

There's also research from the United Kingdom suggesting that those who experience earlier menarche are more likely to report more heavy bleeding and period pain.

From Salon ● Aug. 13, 2022

Several female reproductive factors, including early menarche, early menopause and miscarriage, are associated with an increased risk for heart disease and stroke, British researchers report.

From New York Times ● Jan. 18, 2018

I scheduled my periods right through December, by which time I was certain my real menarche would have finally arrived.

From "Middlesex: A Novel" by Jeffrey Eugenides

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