6Low JA, Killen H, Derrick E J. The prediction and prevention of intrapartumfetal asphyxia in preterm pregnancies [ J ]. Am J Obstet Gynecol,2002,186 ( 2 ) : 279-282.
7Low JA, Victory R, derrick EJ. Predictive value of electronic fetal monitoring for inistapartum fetal asphyxia with metabolicacidosis [ J ]. Obstet Gynecol, 1999,3 (2) :285-291.