Results
CONTRACTIONS
Of the 140 randomized participants, 70 received OMaternal demographics and labor outcomes.Data are expressed as mean ± SD, number (%), or median (interquartile range).*Samples for blood gas analysis: Oxygen group (n = 67), Room Air group (n = 68).Data from Reference (There were no differences between the OPaired umbilical cord venous and arterial blood lactate, glucose, and electrolytes.Data are expressed as median (interquartile range) or mean ± SD.MD, mean difference; CI, confidence interval.The rate of composite high-risk category II FHR tracings was similar between OThe rate and duration of high-risk category ii fetal heart rate (FHR) tracings.Data are expressed as number (%) or mean ± SD.RR, relative risk; CI, confidence interval.Minimal or absent variability: lasting 40 min or more.Recurrent decelerations: more than 50% of uterine contractions were accompanied by decelerations for 20 min or more.*Mean minutes of oxygen group (n = 34) and room air group (n = 36).A total of 1,117 molecular features with a weight of 100 to 1,000 Da were extracted (611 in positive mode, 456 in negative mode) (The volcano plot analysis of differential metabolites. Negative ionization mode Median umbilical cord arterial malondialdehyde in women randomized to oxygen and room air.