Effect of enalaprilat or lactated Ringer solution (LR) infusion on fetal arterial blood pH, Pco2, Po2, hematocrit, hemoglobin, and oxygen content. Infusions were begun on day 0. Values are expressed as means ± SE. #P < 0.05, *P < 0.01 comparing daily measurements to day 0 during enalaprilat or LR infusion.