All patient will be subjected to History Name ,age ,sex Gestational age, postnatal age,preterm, post term labor, babies with congenital anomalies , maternal illness, premature rupture of membrane, prenatal steroid, method ,place of delivery , stress full condition evidence ( fetal bradycardia, late decelerations, meconium aspiration, mechanical ventilation , cardiac massage , drugs, parenteral fluid, enteral feeding (Bf, artificial formula ) caloric intake, GIR (Glucose infusion rate), sepsis, hypoxia , surgical procedure ,complication.