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[Surveillance of pregnancies with placental dysfunction. IV. Significance of biochemical placental values].

The efficacy of four different methods for detection of placental dysfunction has been compared in 265 risk pregnancies. The test were urinary oestriol, urinary pregnanediol, activity of human placental lactogen and heat-stable alkaline phosphatase in the serum. It was concluded that best results were obtained by simultaneous use of urinary oestriol und human-placental-lactogen activity. Early detection of placental dysfunction by urinary pregnanediol and heat-stable alkaline phophatase in the serum were rather exceptional.