Preimplantation development of mouse and human embryos biopsied at cleavage stages using a modified displacement technique

Abstract excerpt

A modified embryo biopsy method was tested on four- and eight-cell stage mouse embryos and used on human embryos to obtain blastomeres for preimplantation genetic diagnosis. The biopsy method tested combines zona drilling and fluid displacement to force one or two cells through an opening in the zona pellucida of the cleavage-stage embryo. Rates of cell division and the percentage of mouse embryos forming...

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