1. Department of Gynecology and Obstetrics, Skejby Sygehus (P.O.), Aarhus, Denmark;
2. Medical Department M (Endocrinology and Diabetes), Aarhus Kommunehospital (N.V., J.S.C., J.O.L.J.), Aarhus, Denmark;
3. Institute of Experimental Clinical Research, Aarhus University (S.F.), Aarhus, Denmark;
4. the Endocrinology Division (J.D.V.), National Science Foundation Center for Biological Timing, and University of Virginia Health Sciences Center, Charlottesville, Virginia 22908