Dr. Marshall, a British physician and a member of the Papal Commission formed VI on birth control, presents an appraisal of the various means under for limiting the number of births. After a survey of the historical back for an understanding of the problem, the author exposes the ineptitude, and scientific, that has characterized many of the teachings and opin and birth control. He then discusses the available means of birth from rhythm to the pill, explaining the advantages and disadvantages of each physiological and psychological points of view. Placing the issue squarely framework of Catholic morality, Dr. Marshall makes a series of constructive regarding changes in Catholic attitudes toward love, marriage, and procreation. to grind, no thesis to prove. It simply sets before the reader the and allows him to judge them for himself. From that standpoint, and be the author's skill in achieving a popular presentation of a difficult be of interest to the informed layman as well as to the clergy.