noun
missed miscarriage; silent miscarriage; delayed miscarriage
Medical term for a miscarriage where the embryo or fetus has died but the body has not expelled the pregnancy tissue. Also called missed abortion in older medical literature.
稽留流産と診断され、手術を受けることになった。
I was diagnosed with a missed miscarriage and had to undergo surgery.
Compound of 稽留 (けいりゅう, 'retention, staying in place') and 流産 (りゅうざん, 'miscarriage'). The exact historical derivation is uncertain, but the term follows standard Sino-Japanese medical compounding patterns.