Abstract
Although the embryos of certain mammals, including man, can be cultured in vitro through several cleavage divisions1,2, it is only in the mouse that complete development through the preimplantation period (one-cell to the blastocyst stage3) occurs without affecting subsequent embryonic viability after transfer1,4. But even in the mouse, development in vitro from the one-cell to the blastocyst stage is restricted to certain inbred strains and F1 hybrids1,3,5,6. In most randomly bred strains the one-cell embryo becomes blocked at the two-cell stage in vitro and it will only continue development if transferred back into the oviduct7. Here we present evidence that this so-called ‘in vitro two-cell block’ can be obviated by injecting small amounts of cytoplasm from embryos which do not exhibit this block.
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Muggleton-Harris, A., Whittingham, D. & Wilson, L. Cytoplasmic control of preimplantation development in vitro in the mouse. Nature 299, 460–462 (1982). https://doi.org/10.1038/299460a0
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DOI: https://doi.org/10.1038/299460a0
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