Ojective To study abnormal umbilical cord and the blood-gas analysis of neonatal asphyxia caused by it.

Results: the abnormal fetal heart rate and fetal movements are important indexes for determining prenatal anoxia, abnormal umbilical cord and amnion are the main causes of intrauterine fetal distress.

Umbilical cord factors, abnormal stage of labor and poor functions of placenta are the main reasons that lead to neonatal asphyxia.