December 23, 2025

Researchers are getting organoids pregnant with human embryos

At first glance, it looks like the start of a human pregnancy: A ball-shaped embryo presses gently into the receptive lining of the uterus and 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…