Fetal biometric data obtained in a sole population with emphasis to sex differences.

Several biometrical parameters have been studied on an homogeneous population sample of 7548 fetuses. The measurement of numerous body and organ sizes on a sole population of fetuses is the only method of considering fetal biometry as a whole and allowing study of the clinical value of some ratios, indices and products of dimensions (not discussed here). The possibility of referring to separate norms for male and female fetuses increases the discriminant power of biometry in detecting fetal growth.