The report of the successful replacement of ovarian tissue into a woman fro
m whom it had been removed 2 years earlier raises several ethical questions
about the use of techniques to prolong or exchange ovarian function (1). I
f the reported technique proves to be safe and effective, it will help wome
n who face oophorectomy, radiation, or chemotherapy for cancer to preserve
ovarian function and thus reproduce. Although this advance is unlikely to g
enerate the controversies that reproductive innovations such as surrogacy a
nd cloning have, important ethical issues will arise if such techniques lea
d to premenopausal ovarian storage by healthy women or ovary donation from
cadavers or fetuses.