Though all children do not grow at the same rate, there is an expected growth pattern to which babies normally conform. Why some infants do not gairl and grow at the expected rate is not clearly understood, as in many instances no organic cause can be determined. The normal growth rate during the first year of life is relatively greater than in any comparable period postnatally. During this year, the baby's average increase is 50 percent in length and 200 percent in weight ( 1 ) . Illterest in environmental and psy-