
1) Start
Found on
https://www.crosswordclues.com/clue/menarche

Menarche (iː {respell|mə|NAR|kee}; Greek: μήν mēn `moon` + ἀρχή arkhē `beginning`) is the first menstrual cycle, or first menstrual bleeding, in female humans. From both social and medical perspectives, it is often considered the central event of female puberty, as it signals the possibility of fertility. Girls experience menarche ...
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http://en.wikipedia.org/wiki/Menarche

first menstruation
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http://phrontistery.info/m.html

(Gr. mn month + arch beginning) the establishment or beginning of the menstrual function.
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http://users.ugent.be/~rvdstich/eugloss/DIC/dictio53.html

(from the article `human behaviour`) ...of growth in height and weight also occurs during this phase. This so-called growth spurt occurs about two years earlier in females than in males. ... Several `firsts,` including the first tooth, the first game killed by a boy, and a girl`s first menstruation (menarche), were ceremoniall...
Found on
http://www.britannica.com/eb/a-z/m/70

<gynaecology> The establishment or beginning of the menstrual function. ... Origin: Gr. Men = month, arch = beginning ... (18 Nov 1997) ...
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http://www.encyclo.co.uk/local/20973

(mә-nahr´ke) establishment or beginning of the menstrual function. adj., menar´chal, menar´cheal., adj.
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http://www.encyclo.co.uk/local/21001

A girl`s first period.
Found on
http://www.encyclo.co.uk/local/21429

Type: Term Pronunciation: me-nar′kē Definitions: 1. Establishment of the menstrual function; the time of the first menstrual period.
Found on
http://www.medilexicon.com/medicaldictionary.php?t=54074

Menarche: The time in a girl's life that menstruation first begins. During the menarche period, menstruation may be irregular and unpredictable. Mood, weight, activity level, and growth rate may fluctuate with the hormone levels as well. Synonymous with female puberty.
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http://www.medterms.com/script/main/art.asp?articlekey=4345

(mue-nar;ke) The first menstrual discharge.
Found on
http://www.mhhe.com/biosci/abio/glossary.mhtml

The first menstrual period that a woman experiences. It usually occurs around twelve or thirteen years of age. Narrower term(s): Premature Menarche
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http://www.pregnology.com/

The beginning of the reproductive phase of a woman's life.
Found on
http://www.swsbm.com/ManualsMM/MedHerbGloss2.txt

[
n] - the first occurrence of menstruation in a woman
Found on
http://www.webdictionary.co.uk/definition.php?query=menarche

the beginning of menstruation
Found on
https://www.encyclo.co.uk/local/20875
noun the first occurrence of menstruation in a woman
Found on
https://www.encyclo.co.uk/local/20974

The onset of menstruation.
Found on
https://www.encyclo.co.uk/local/22842

a young woman's first menstrual period.
Found on
https://www.stanfordchildrens.org/en/topic/default?id=glossary---adolescent
No exact match found.