noun
twin pregnancy
Medical term for a pregnancy with two fetuses. Used in clinical contexts.
双胎妊娠は単胎妊娠よりリスクが高いとされています。
Twin pregnancies are considered to carry higher risks than singleton pregnancies.
Common word for twins (the children), while 双胎妊娠 refers specifically to the pregnancy state.
Compound of 双胎 (sōtai, 'twins') and 妊娠 (ninshin, 'pregnancy').