trophoblast

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• 4. marts 2016 fra wordnet.princeton.edu

  trophoblast — navneord — engelsk

  the membrane that forms the wall of the blastocyst in early development; aids implantation in the uterine wall; "after implantation of the blastocyst in the uterine wall the trophoblast divides into two layers, the chorion and the placenta"