1. From the Department of Pediatrics and The Metabolic Research Unit, Child Health Research Center, University of California, San Francisco, California
2. Supported by the National Cooperative Program for Infertility Research U54-HD34449, and National Institutes of Health Grants DK37922 and DK42154.
3. Presented at the Society for Fetal Urology Panel Discussion on Prenatal Diagnosis of Genital Anomalies, San Francisco, California, October 16, 1998.