“…This view is based on the blood-volume studies by Dieckmann and Wegner (1934) and others, which revealed that, with advancing pregnancy, the increase in plasma volume outstrips a similar increase in the red-cell mass. Since it was shown, however (Benstead and Theobald, 1952;Fisher and Biggs, 1955;Kerr and Davidson, 1958), that a majority of such "physiological " anaemias respond to iron therapy, it has become necessary to revise the definition of pregnancy anaemia (Holland and Bourne, 1955;Camilleri, 1958). In our opinion the haemoglobin of a normal woman in late pregnancy should be at least 80% (11.81 g./100 ml.…”