The Download: mimicking pregnancy's first moments in a lab, and AI parameters explained

The Download: mimicking pregnancy's first moments in a lab, and AI parameters explained Plus: Google and Character.AI have settled a lawsuit linking their AI to the death of a teenager At first glance, it looks like the start of a human pregnancy: A ball-shaped embryo presses into the lining of the uterus then grips tight, burrowing in as the first tendrils of a future placenta appear. This is implantation--the moment that pregnancy officially begins. Only none of it is happening inside a body. These images were captured in a Beijing laboratory, inside a microfluidic chip, as scientists watched the scene unfold. In three recent papers published by Cell Press, scientists report what they call the most accurate efforts yet to mimic the first moments of pregnancy in the lab. They've taken human embryos from IVF centers and let these merge with "organoids" made of endometrial cells, which form the lining of the uterus.