A team of researchers has 3D printed working ovaries which, when implanted in a mouse, functioned just as natural ovaries would. The mouse's existing ovary was removed and replaced with the 3D printed one, which ovulated and enabled her to give birth and even nurse her babies. The study has huge implications for cancer patients who have lost their fertility due to their treatments. Read more at 3DPrint.com: http://3dprint.com/174583/mouse-3d-printed-ovary/