a first approach , based on the pattern of coefficients of correlation between maternal and paternal weight and height , and birth weight ( tab . i ) , may be criticized for two reasons : 1 ) it does not take into account the possible variations of this pattern of correlations from one subcategory ( for instance of age ) of the sample to another and ii ) it makes no difference between `` '' genetic '' '' and `` '' environmental '' '' components of parental influence on birth weight .
C0005910
weight
C0005612
on birth we