Researchers Freeze, Reimplant Rat Ovaries

Canadian researchers have frozen rat ovaries then successfully reimplanted them in--an advance that could lead to a new way for women undergoing cancer treatments to retain their fertility. Chemotherapy often destroys eggs.

Dr. Roger Gosden and his colleagues at McGill University reported in the Jan. 24 issue of Nature that they restored fertility in most of the seven rats they treated and that one became pregnant.

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Compiled by Times medical writer Thomas H. Maugh II.