The problem of pregnancy in a patient with heart disease is always one of serious concern. Paul D. White1states that "the important question concerning heart disease in pregnancy is the prognosis, one of the most difficult problems in medicine." Should the gestation be terminated or should there be no intervention in a cardiac patient? Is there any assurance that in the gravidocardiac patient, with good cardiac compensation, heart failure may not develop later, because of the added burden of pregnancy? When the heart disease is due to complete heart block and pregnancy supervenes, as in the case here reported, what procedure should be followed? It is interesting to note that a study of the literature up to Jan. 1, 1936, yielded only six2recorded cases of complete heart block in which successful gestation had occurred. Herrmann and King3reported one of these six cases. Their patient