what do you mean by menarch and menopause and matter ( definition)
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Explanation:
menarch:it is the term when periods starts at irregulary
menopause:it is the term when at50 years of age the periods stops
matter:it is something that occupies space and have mass
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Answer:
The beginning of menstruation [ first menstrual flow ] at puberty is called menarch
Explanation:
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