Numbers Count For In Vitro Fertilization Of Human Embryos.

In DNA, Genetics by Brainy Days Ahead

The healthy development of an embryo created through in vitro fertilization (IVF) depends on whether most, if not all, of the cells have the proper number of chromosomes. In 2013 in the United States, more than 15 percent of IVF pregnancies ended in miscarriage, often because of “aneuploidy,” which means an abnormal number. Doctors can use pre-implantation genetic screening (PGS) technology to spot-check chromosome count before choosing which embryo to implant in the mother. In a new article, however,  scholars at Brown University and the University of Washington report that PGS has serious limitations that can only be overcome with more human embryo research.