[Value of antepartal cardiotocogram in risk pregnancies--comparative evaluation of the non-stress test and oxytocin stress test].

247 patients with risk of uteroplacental insufficiency were monitored by 434 oxytocin challenge tests (OCT) and non-stress-tests (NST). A non-reactive NST was found in 20% of the patients. Late decelerations in the OCT were observed in 19%. With respect to late decelerations and loss of reactivity in the OCT, the results of the stress tests were pathological in 29% of the patients. Based on the evaluation of late decelerations only, the OCT does not appear to be superior to the NST. Only when the reactivity criterion is additionally taken into account can the diagnostic rating of the OCT be given more value than that of the NST. Furthermore, it could be established that the loss of reactivity is of greater importance than late decelerations in the presence of reactivity.