An article on the usage of “mosaic” embryos containing normal and abnormal cells, mentions Dr. Glenn L. Schattman’s editorial, which found that embryos with up to 50% of abnormal cells implanted at the same rate as those that tested as normal. Dr. Schattman’s editorial accompanied a study, published in Fertility and Sterility in January, which evaluated how many mosaic embryos resulted in the births of healthy babies.