Document Type



Centile values for weight velocity at six weeks in breast fed British infants are presented. They are similar to those previously reported for American babies. A secular trend to reduced weight velocities is recorded between 1972 and 1977 in bottle fed babies. This reduction in weight gain preceded the widespread introduction of modified infant formulae in Britain and coincided with improvement in preparation of feeds, increased incidence of initial breast feeding and reduction in the early introduction of solids, Breast fed babies from high social class families gained more weight than either other breast fed or bottle fed infants.