Original Contribution Human Sexual Size Dimorphism in Early Pregnancy

1 Department of Obstetrics and Gynecology, University of Texas Medical Branch, Galveston, TX. 2 Department of Obstetrics and Gynecology, University of Cambridge, Cambridge, United Kingdom. 3 Department of Obstetrics and Gynaecology, Royal College of Surgeons in Ireland, Dublin, Ireland. 4 Department of Obstetrics and Gynecology, University of Utah and Intermountain HealthCare, Salt Lake City, UT. 5 The Fetal & Women’s Center of Arizona, Scottsdale, AZ. 6 Department of Fetal Imaging, William Beaumont Hospital, Royal Oak, MI. 7 Department of Obstetrics and Gynecology, Columbia University College of Physicians and Surgeons, New York, NY. 8 Department of Obstetrics and Gynecology and Women’s Health, Albert Einstein College of Medicine, Bronx, NY. 9 Department of Obstetrics and Gynecology, University of Colorado Health Sciences Center, Denver, CO. 10 Department of Obstetrics and Gynecology, Tufts University School of Medicine, Boston, MA. 11 Department of Obstetrics and Gynecology, New York University School of Medicine, New York, NY. 12 Department of Obstetrics and Gynecology, Brown University School of Medicine, Providence, RI. 13 Department of Obstetrics and Gynecology, University of North Carolina Medical Center, Chapel Hill, NC.