I didn't even know that ovarian transplants were possible, but indeed they are. Not only that, but one cancer survivor who underwent an ovarian transplant later gave birth to a child naturally, even though her chemo treatment put her in early menopause earlier. After the Danish woman was diagnosed with Ewings sarcoma, they preserved part of her ovary before undergoing radiation therapy. The case was reported in the journal Human Reproduction. {via WebMD}