In standard IVF, eggs harvested from a woman are fertilised in the lab and allowed to develop in an incubator for 2 to 5 days. The healthiest embryos are chosen to be transferred into the uterus.
The new device allows embryos created in the lab to be incubated inside a perforated silicon container inserted into a woman's own womb. After a few days, the capsule is recovered and some embryos are selected for implantation in the womb (see image, top right)
Embryos incubated in the lab must have their growth medium changed every few hours to provide new nutrients and get rid of waste. The new device provides a more natural environment.
It's not an "exowomb," but it's in the neighborhood.