noun
Medical and formal term for giving birth to more than one baby at a time (twins, triplets, etc.).
多子出産のリスクについて医師から説明を受けた。
I received an explanation from the doctor about the risks of multiple births.
不妊治療では多子出産の可能性が高まることがある。
In fertility treatment, the possibility of multiple births can increase.
Compound of 多子 (たし, 'many children') and 出産 (しゅっさん, 'childbirth'). The exact historical derivation is uncertain; the term is used in modern medical contexts.