RT Book, Section A1 Cunningham, F. Gary A1 Leveno, Kenneth J. A1 Bloom, Steven L. A1 Dashe, Jodi S. A1 Hoffman, Barbara L. A1 Casey, Brian M. A1 Spong, Catherine Y. SR Print(0) ID 1160773371 T1 Amnionic Fluid T2 Williams Obstetrics, 25e YR 2018 FD 2018 PB McGraw-Hill Education PP New York, NY SN 9781259644320 LK obgyn.mhmedical.com/content.aspx?aid=1160773371 RD 2024/09/17 AB It is generally agreed that amniotic fluid represents in great part a transudation from the maternal vessels, but many authorities consider that a portion of it is derived from urinary secretion of the foetus.—J. Whitridge Williams (1903)