1. Departments of Reproductive Medicine (V.V.V., M.A.L., P.L.M.), University of California, San Diego, La Jolla, California 92093-0674
2. Neuroscience (V.V.V., P.L.M.), University of California, San Diego, La Jolla, California 92093-0674
3. Medicine (D.D., N.J.G.W.), University of California, San Diego, La Jolla, California 92093-0674
4. Medical Research Service (N.J.G.W.), San Diego VA Healthcare System, San Diego, California 92161