“…The highly significant correlation between the concentration of bile pigment and protein (Table H) in normal liquor agrees with the findings of others in Rh-affected pregnancies (Wild, 1961;Dunstan, 1968), and by inference with statistical evidence (Walker et al, 1969), showing that both bilirubin and protein are indices of the severity in haemolytic disease. Though the manner in which bilirubin enters the liquor is still in doubt, it is thought (Wild, 1961), in view of the strong binding between bilirubin and serum albumin (Martin, 1949;Barac, 1953), that most unconjugated bilirubin is attached to liquor albumin, which forms about two-thirds of the total protein (Wild, 1961) and is far in excess of that required to transport the bilirubin (Watson et al, 1965).…”