初しょ生せい児じ

noun

newborn baby; neonate

Formal or medical term for a newborn infant, especially in the first few weeks of life. In everyday speech, 新生児 (しんせいじ) is more common.

• 初しょ生せい児じの健けん康こう診しん断だんは生せい後ご一いっヶか月げつ以い内ないに行おこなわれます。

  A health checkup for newborns is conducted within one month after birth.