1. Department of Animal Science (J.R.W.), University of Nebraska, Lincoln, Nebraska 68583
2. the National Primate Research Center (D.A.D., D.H.A.), University of Wisconsin, Madison, Wisconsin 53715
3. the Mayo Clinic (D.A.D.), Rochester, Minnesota 55905
4. Reproductive Medicine and Infertility Associates (D.A.D.), Woodbury, Minnesota 55125
5. the Department of OB/GYN (D.H.A.), University of Wisconsin, Madison, Wisconsin 53715
6. the Department of OB/GYN (J.F.S.), Virginia Commonwealth University, Richmond, Virginia 23298