In order to know whether a baby is normal and developing properly, there must be certain standards for judgement, but individual babies will vary somewhat from the average. To state that an average infants birth weight should be seven pounds, sets a value that is strictly true for only a few. Many who are perfectly normal weigh six, eight, or nine pounds. Extreme variations are significant. More important than size and growth at any particular period is a constant and steady progress evaluated by various established criteria
What should be set in order to know whether a baby is normal and developing properly?
color of the skin
certain standards
rearing methods
standard age