What’s Next for Lab-Grown Human Embryos?

August 31, 2021

(Nature) – In May, the International Society for Stem Cell Research (ISSCR) released new guidelines that relaxed the 14-day rule, taking away the hard barrier. Although only a few labs around the world have perfected the techniques needed to culture human embryos up to day 14, the science is advancing rapidly. The relaxed rule allows lab groups, in countries where it is legal, to apply to the regulators for permission to continue research past 14 days. Such studies could reveal what happens during human development after the embryo would normally have implanted in the uterus, about a week after fertilization. It then goes through a stage called gastrulation, roughly between days 14 and 22, when the body’s main pattern emerges and the foundations are laid for organ generation. (Read Full Article)