The goal of this observational study is to evaluate the effect of neonatal delivery time on umbilical cord blood gas parameters in pregnant women undergoing elective cesarean section under general or spinal anesthesia. The study population consists of adult pregnant women aged 18-40 years with singleton term pregnancies scheduled for elective cesarean delivery. The main questions it aims to answer are: Is neonatal delivery time associated with changes in umbilical artery pH values under general and spinal anesthesia? Is neonatal delivery time associated with changes in umbilical artery base excess under general and spinal anesthesia? Researchers will compare cesarean sections performed under general anesthesia with those performed under spinal anesthesia to determine whether the relationship between delivery time and umbilical cord blood gas parameters differs between anesthesia techniques. Participants will: Undergo elective cesarean delivery under general or spinal anesthesia as part of routine clinical care Have neonatal delivery time recorded intraoperatively Have umbilical artery blood gas parameters (pH and base excess) measured immediately after birth as part of standard neonatal assessment
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Umbilical Artery pH
Timeframe: Immediately after delivery