[The relative contribution of the upper and lower segments to growth in boys]

In a longitudinal growth study of 64 boys, the contribution of the upper and lower segments was analysed. The results are compared to an earlier study in girls, and the difference between the sexes was related to the puberty growth spurt. This is later, more prolonged and of greater amplitude in the boys. Lower segment growth contributed to the spurt in 25% of the boys.