…60% of the latter have chromosomal abnormalities or abnormalities in sex differentiation. On the other hand, when menarche occurs before the age of 8 or 9, it is called premature menarche. This can be caused by premature puberty due to endocrine abnormalities, ovarian tumors, brain tumors, etc. … *Some of the terminology that mentions "premature menarche" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…後者の60%に染色体異常や性分化異常がみられる。一方,8~9歳以前に初潮をみる場合を早発月経premature menarcheという。これは,内分泌異常による早熟,卵巣腫瘍,脳腫瘍などが原因となっていることがある。… ※「premature menarche」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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