noun
multiple pregnancy; multiple birth
Medical term covering pregnancy with more than one fetus, as well as the resulting birth of multiples (twins, triplets, etc.).
多胎妊娠は単胎妊娠よりリスクが高い。
Multiple pregnancy carries higher risks than singleton pregnancy.
彼女は多胎を経験し、双子を出産した。
She experienced a multiple birth and gave birth to twins.