Reliability of fetal anthropometry by ultrasound.

The increasing importance of ultrasound in obstetrical practice requires a sound knowledge of the technique and of the reproducibility and accuracy of the measurements. In most obstetrical clinics, scanning are not always performed by the same technician and therefore the lack of Information about the errors in measurement of the different observers or of one observer may lead to inaccurate procedures. In this paper, the errors made by one observer in two consecutive scannings (intra-observer errors) and the differences among observers are determined, äs well äs the accuracy of the echograph for measuring fetal structures.