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Cardiotocography (CTG), i. e. the recording of fetal cardiac actions and maternal uterine contractions offers a tremendous amount of new 1 Information about the state of the yet unborn child before and during birth. The visual Interpretation of CTG until now has been subjective and is based only upon descriptive criteria. The arbitrary introduction of catchwords has muddied the CTG nomenclature and made a precise communication of research reports quite difficult. For this reason and because not every clinician can be expected to have experience in the Interpretation of curves and detailed knowledge in biological feedback Systems, the evaluation of the tracings is often uncertain and published results, at times, offer confusing Information. For the reasons cited, the search for criteria which describe the informational content of CTG or even Interpret them is understandable. This part of our work will point out an approach towards the derivation of descriptive CTG parameters. The subsequent part will examine these parameters in reference to the content of the clinical Information, and in the concluding part an evaluating CTG parameter is calculated from the descriptive parameters. l Methode of transferring analog CTG curves onto magnetic tape Until CTG Standards have been es tablished from objective evaluation criteria, an pn-line evaluation where patient data are directly f ed into the Computer Curriculum vitae Dr. r er. nat. JÜRGEN MOR-GENSTERN was bor n 1939 in Hamburg. He stndied physics, obtained bis diploma in 1965 and earned bis doctorate in 1969 in tbe area of nuclear physics.

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