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superfetation

英[sjuːpəfiː'teɪʃən] 美[ˌsjuːpəfiː'teɪʃən]
  • [生]异期复孕,重孕

详细释义

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"

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