The Most Advanced Embryo Models Yet Mimic the First Two Weeks of Human Development

Forget sperm meets egg. Using human stem cells, scientists have created human embryo-like structures inside petri dishes. These lab-grown blobs develop multiple structures that mimic a human embryo after implantation into the uterus--a major milestone for fertility--and last at least 14 days. A decade ago, manufacturing embryo-like structures, or embryoids, without reproductive cells would have […]