superfetation

• 医学术语，指在已经怀孕之后又发生第二次受精，导致子宫内同时发育两个胎龄不同的胎儿。

A medical term referring to the fertilization of a second ovum after a pregnancy has already begun, resulting in two fetuses of different ages developing simultaneously in the uterus.

不可数

1. Second conception during pregnancyC2formalmedical

   The fertilization of a second ovum after a pregnancy has already begun, resulting in two fetuses of different developmental stages in the uterus simultaneously.

   孕期再次受孕

   • Superfetation is extremely rare in humans but more common in some animals.
   • The doctor explained that superfetation can lead to twins born days or weeks apart.
   • Cases of superfetation have been documented in medical literature.