How to say "miscarriage" in Japanese

• 流産りゅうざんCommon
  noun, suru verb, intransitive verbThe word for the medical sense: the spontaneous loss of a pregnancy. Use it when 'miscarriage' refers to losing a baby during pregnancy.
  流産りゅうざんはとても辛つらい経験けいけんです。↗

  Miscarriage is a heart-breaking experience.
• 不成立ふせいりつCommon
  nounCovers 'miscarriage' in the abstract sense of something failing, falling through, or being rejected; a typical context is a bill or motion that does not pass.

Choose 流産 for the medical sense of 'miscarriage', the loss of a pregnancy, and 不成立 for the abstract sense of something such as a bill or motion failing, falling through, or being rejected.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 流産りゅうざんmiscarriage
• 不成立ふせいりつfailure (e.g. of a bill, motion)
• 自然流産しぜんりゅうざんnatural abortion
• 頓挫とんざsetback