Abstract
An attempt has been made to ascertain the magnitude and some of the sources of error inherent in ultrasonic cephalometry, both in relation to specific measurements of the head and to derived estimates of fetal weight and maturity. Measurements were made on nearly 100 normal gravidas near term and on their infants shortly after birth. In addition, 487 measurements were made on newborn infants selected at random. Growth curves and estimations of accuracy were derived from these data. Finally, preliminary growth curves were constructed for infants of abnormal gravidas. Ultrasonic cephalometry has shown a high degree of accuracy in forecasting infant maturity and weight.
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