A study of infant growth in relation to the type of feeding.

A total of 133 breast fed newborn babies, and 106 bottle fed babies, were selected and studied prospectively. Details taken of feeding practices have shown that by 5--7 wk of age bottle feeds had been introduced in about 50% of breast fed babies. Entirely breast fed babies received their first solid food later than breast-and-bottle fed or entirely bottle fed babies when such babies were in social class I, II or III, but in social class IV and V entirely breast fed babies were weaned at a similar age to those in the other two groups of babies. In the first 5--7 wk of life there was a significant negative correlation between the increase in skinfold thickness and the skinfold thickness at birth. The study has also shown that the present practice of feeding babies modified milks retards weight gain and the increase in subcutaneous fat in male babies.