Definition of Menarche
Menarche: The time in a girl's life when menstruation first begins. During the menarche period, menstruation may be irregular and unpredictable. Also known as female puberty.
Source: MedTerms™ Medical Dictionaryhttp://www.medterms.com/script/main/art.asp?articlekey=4345
Last Editorial Review: 3/19/2012
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