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...

This is today's edition ofThe Download,our weekday newsletter that provides a daily dose of what's going on in the world of technology. 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 into the lining of the uterus then grips tight,...