Embryonic Sex Differentiation and Sex Hormones (1947), by Carl R. Moore
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In 1947, Carl Richard Moore, a researcher at the University of Chicago, in Chicago, Illinois, wrote Embryonic Sex Differentiation and Sex Hormones, which was published in the same year as a first-edition monograph. In the book, Moore argues that regulation of sex differentiation in mammals is not controlled by sex hormones secreted by embryonic sex organs (gonads), but is controlled by non-hormonal genetic factors. In support of his hypothesis, Moore describes the current literature on sex differentiation, and he reviews experiments on vertebrates and invertebrates and his own work with opossum (Didelphis virginiana) young.