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A system of supervision which we developed was described. With this system it is possible to make on-line evaluations of the CTG and postpartal blood analyses from the cord blood via computors (AEG 60-10 and AEG 60-50). The computed parameters together with all obstetrical data collected during the pregnancy (results from ultrasonic tests, estrogen and HPL analyses, anamnestic data and additional "clinical findings") as well as off-line evaluated CTG findings made during the course of the pregnancy were scored. The CTG is evaluated on-line via the "cross correlation function" and can be produced in a wide variety of parameters at any time during labor. The complete system is demonstrated on the basis of an individual case analysis. The first statistical individual case analyses of deceleration in CTG were compared with the classical Hon and Caldeyro-Barcia method of calculation.