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  • Title: Trophoblastic vesicles of preimplantation blastocysts can enter into quiescence in the absence of inner cell mass.
    Author: Surani MA, Barton SC.
    Journal: J Embryol Exp Morphol; 1977 Jun; 39():273-7. PubMed ID: 886260.
    Abstract:
    Preimplantation mouse blastocysts were dissected into inner cell mass (ICM) and trophoblast cells. These fragments were transferred to pseudo-pregnant mice which were left intact or ovariectomized. The latter group received progesterone to permit blastocysts and the dissected fragments to enter into quiescence, prior to injection of oestradiol to induce implantation. Trophoblastic vesicles, without ICM, entered into quiescence and implanted whereas the ICM did not. The entry of trophoblast into quiescence does not appear therefore to be governed by the ICM.
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