New 3D printed ovaries allow infertile mice to give birth

Scientists at Northwestern University 3D printed a functional ovary out of Jello-like material and living cells. When implanted into mice that had their ovaries removed, the moms regained their monthly cycle and gave birth to healthy pups.
Although the study was done in mice, scientists developed this implant with downstream human applications in mind. If successful in humans, the prosthetic would be able to extend the female reproductive lifespan by decades. What's more, it may also help restore fertility and hormone function in women who can’t have kids due to ovarian issues.

http://singularityhub.com/2016/04/1...etic-ovary-restores-female-fertility-in-mice/