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From the Department of Obstetrics and Gynecology, Pennsylvania Hospital and School of Medicine, University of Pennslyvania, Philalelphia, Pa, 19107.
Abstract
Currently, serial measurements of maternal urinary estriol excretion is the most reliable and well-defined index of fetoplacental function. However, there are technical and maternal factors which can cause a decrease in reported estriol values without an associated decline in fetal well being. A discussion of these various factors is presented and may explain some instances of seemingly spurious results.
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