In young women, some treatments for cancer or other conditions (such as sickle cell anemia) may give rise to primary ovarian insufficiency. Ovarian transplantation is one of the available options for fertility preservation, with highly variable pregnancy rates.
Janse, F., Donnez, J., Anckaert, E., de Jong, F. H., Fauser, B. C. J. M., & Dolmans, M.-M. (2011). Limited value of ovarian function markers following orthotopic transplantation of ovarian tissue after gonadotoxic treatment. Journal of Clinical Endocrinology and Metabolism, 96(4), 1136-1144. https://doi.org/10.1210/jc.2010-2188 (Original work published 2011)