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HAMILTON LEWIS A. MD FACOG; SZUIEWSKI, PETER F. BS; PATEL, MINU K. MSc
Obstetrics & Gynecology: June 1973
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Our fetal maturity formula uses a multiple regression model encompassing the results of fetal biparietal cepbalometry, amniotic Ouid creatinine and estimated fetal weight from 100 high-risk patients. A table was prepared from the maturity equation and tested with data from 54 additional high-risk patients. The predicted gestational ages were compared with the correlated gestationa! ages, as based on menstrual histories and physical and neurologic examinations of newborn infants. The standard deviation of the difference of the predicted versus correlated gestational age was 0.93 weeks. Hence, a successful prediction on the basis of this variability is defined as one in which the predicted gestational age was within 2 weeks of the correlated age. In the prediction group of 54 patients only 2 were more than 2 weeks from the correlated age. This fetal maturity formula, which solves for gestational age, is useful in the clinical management of the high-risk fetus

© 1973 The American College of Obstetricians and Gynecologists