Recent Progress in Hormone Research, Volume 32 covers the proceedings of the 1975 Laurentian Hormone Conference. The book discusses genetic approaches to steroid hormone action; the cytochemical bioassay of hormones; and crystal structure of steroids. The text also describes the gonadotropin-releasing hormone and thyrotropin-releasing hormone; the ontogenesis of pituitary hormones and hypothalamic factors in the human fetus; and the etiologies of sexual maturation. The epidemiologic studies of diabetes in the Pima Indians; and the adrenal cortex and essential hypertension are also considered. The book further tackles the testicular control of follicle-stimulating hormone secretion; and nuclear receptors and the initiation of thyroid hormone action. The text then encompasses the receptor function and ion transport in turkey erythrocytes; the regulation of adenylate cyclase coupled beta-adrenergic receptors; and the control of cyclic AMP metabolism in parental and hybrid somatic cells. The molecular mechanisms of cyclic AMP action are also looked into. Endocrinologists, physiologists, molecular biologists, and biochemists will find the book invaluable.