Original Article: PDF OnlyFetal Blood Studies XX. Levels of Human Fetal Hemoglobin During PregnancyCOTTER, JULIAN M.D.; PRYSTOWSKY, HARRY M.D., F.A.C.O.G.Author Information From the Department of Obstetrics and Gynecology, University of Florida College of Medicine, Gainesville, Fla. Obstetrics & Gynecology: May 1964 - Volume 23 - Issue 5 - p 735-737 Free © 1964 The American College of Obstetricians and Gynecologists