Outcomes and data collection
acidemia, bradycardia
ACIDEMIA, SECONDARY, FETAL HYPOXIA
The primary outcome of this analysis was the Ua lactate. The paired Uv and Ua blood samples were collected as recommended by ACOG (The secondary outcome was the high-risk category II FHR tracings, including the number of women who developed high-risk category II FHR tracings during labor and the duration of those tracings. The high-risk category II FHR tracings were defined as any of the following features: baseline bradycardia, minimal or absent variability, recurrent variable decelerations, and recurrent late decelerations, as these features might suggest an increased risk for fetal hypoxia or acidemia (