Investigators will exclude any woman with prior rupture of membranes, any woman receiving magnesium sulfate. Any woman who has a known drug history will not be approached for study participation. Investigators will exclude a fetus with known congenital anomalies or if meconium stained fluid is present. Investigators will also exclude a mother with maternal fever, chorioamnionitis, fetal distress e.g. abnormal fetal heart tracing, as well as non vigorous newborn at birth (defined as per NRP guidelines as infant with apnea/gasping, heart rate <100/min, poor tone).