superfetation

英[sjuːpəfiː'teɪʃən] 美[ˌsjuːpəfiː'teɪʃən]
  • [生]异期复孕,重孕
  • cross v.穿过;交叉;杂交;反对;勾掉;碰见;阻挠n.十字架;十字形;杂交动植物;苦难adj.交叉的;相反的;生气的;杂交的
  • super adj.超级的;极好的
Noun:
  1. fertilization of a second ovum after a pregnancy has begun; results in two fetuses of different ages in the uterus at the same time;

    "superfetation is normal in some animal species"