A comparison of the nonstress test, oxytocin challenge test, Doppler velocimetry and biophysical profile in predicting umbilical vein pH in growth-retarded fetuses.
Shalev E, Zalel Y, Weiner E.
Int J Gynaecol Obstet. 1993 Oct;43(1):15-9. doi: 10.1016/0020-7292(93)90268-2.
PMID:7904948
Uterine and umbilical circulation during the oxytocin challenge test.