There are different approaches to both steps, including mechanical, chemical, and physical ( Tyrode's acidic solution ) and laser technology for the breaching of the zona pellucida, extrusion or aspiration for the removal of PBs and blastomeres, and herniation of the trophectoderm cells.
22.
All the cells eventually die, but scientists can still harvest embryonic-type stem cells from the mass, according to Dr . Felix Beck, a professor at the University of Leicester and one of the authors of a scientific paper in May that described how the gene affects the trophectoderm in mice.
23.
Rayon T, Menchero S, Nieto A, Xenopoulos P, Crespo M, Cockburn K, Canon S, Sasaki H, Hadjantonakis AK, de la Pompa JL, Rossant J, Manzanares M . ( 2014 ) "'Notch and hippo converge on Cdx2 to specify the trophectoderm lineage in the mouse blastocyst . " "'Dev Cell " . 30 ( 4 ) : 410-22.
