Fig. 4.

Normal and volume-loaded amniotic fluid volume function curves. Top right: volume-loaded function curve after infusion of 4 l/2 days (1.39 ml/min) of lactated Ringer solution in 6 fetuses in which urine either entered the amniotic fluid (■) or was isovolumically replaced with lactated Ringer solution (●). Bottom left: amniotic fluid volume function curve before amnioinfusion from Fig. 2 in 6 ovine fetuses under control conditions (☐) and in the same fetuses when their urine was isovolumically replaced with lactated Ringer solution (○). Data from Refs. 9 and 24. Regression (solid lines) and 95% confidence intervals (dotted lines) are shown.