Ovarian graft. Computer illustration of healthy tissue (pale pink, upper centre) from an ovary (pink, lower left) before it is implanted into another woman's reproductive system (lower right). The graft's egg-producing follicles (round) can be stimulated by hormone therapy to release eggs. Ovarian grafts may partially restore fertility in female cancer patients whose ovaries have been damaged by chemotherapy or radiation treatment. In this case the woman receiving the implant has had her ovary removed, perhaps due to cancer or an ovarian cyst.