“…A staggering literature has accumulated on physical growth (60,65,81,82), but many of these studies add little to our understanding of growth beyond that projected by Baldwin (4) or Porter (97) in their original studies made over twenty-five years ago. The more useful studies of growth are those which have brought to focus the importance of individual differences in growth rates and the limitations of average growth curves in describing the growth pattern in individual children (27,31,42,43,53,92,119).…”