For Menarche we have terms and definitions in 18 topics. The topics are Alternative Health, Anthromorphemics, Anthropology, Breast Cancer, Developmental Psychology, Female Health, Female Health Concerns, Fertility, Gynecological, Gynecology, Health, Human Body, Human Reproduction, Medical, Naturopathic, Sex, Sexual Health and Sexually Transmitted Diseases.

the onset of menstrual periods
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First menstruation.
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First menstruation.
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First menstrual period.
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The first menstrual period of a girl in puberty.
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The first menstrual bleeding (period). The usual age range is from 10-15 with the average about 12.5 years. The age of menarche has dropped (called the secular trend) during the past century but the age of menarche now appears to be stabilizing in developed countries in the 21st century.
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The first time that a girl or young woman menstruates.
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The time when a woman has her first menstrual period
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A young woman's first menstrual period.
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A young woman's first menstrual period.
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A young woman's first menstrual period.
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the onset of menstruation, signalling the body's coming readiness for childbearing.
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Onset of the menses.
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The beginning of menstruation
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The beginning of the reproductive phase of a woman's life. It usually begins with night sweats, continues a few months later with estrogen, followed by ovulation, then the full cycle and the growth of secondary sexual characteristics...in various order. Also called adolescence or puberty, it is mirrored in reverse at the end of the reproductive years as menopause.
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The onset of menstruation; the first menstrual period.

The time of a girl's first menstruation.
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The first time menstruation happens. People say that it is when a girl becomes a woman.
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