Jeanty P, Kirkpatrick C, Dramaix-Wilmet M, Struyven J
Radiology. 1981 Jul;140(1):165-8. doi: 10.1148/radiology.140.1.7244221.
Biparietal diameter and femoral and humeral length were measured by ultrasonography and correlated with age in 450 normal pregnancies. The resulting data may be helpful in detecting fetal limb malformation.