Failure to thrive at the breast: an old problem revisited.

Four apparently normal breast-fed infants failed to thrive when fed on demand. They all shared a tendency to accept long intervals between feeds from birth. Infant welfare clinics should be alerted to this problem. If infants who attend these clinics are accurately weighed and their progress carefully recorded on weight charts this insidiously developing complaint could be detected earlier and with appropriate advice, a potentially serious condition averted.