初しょ潮ちょう

noun

menarche; first menstruation

Medical and everyday term for a girl's first menstrual period.

• 初しょ潮ちょうを迎むかえる平へい均きん年ねん齢れいは12歳さい前ぜん後ごです。

  The average age for menarche is around 12 years old.

• 娘むすめに初しょ潮ちょうが来きたとき、母ははは優やさしく説せつ明めいした。

  When her daughter had her first period, the mother explained it gently.