Estrogens are a family of hormones that potently regulate reproductive, cardiovascular, bone, brain, and other physiology by altering gene expression. In this book, the authors present topical research in the study of the biochemistry, therapeutic uses and physiological effects of hormones. Topics include the physiological effects of oestrogen in fish and its application; estrogens in osteoarthritis and inflammation; estrogens as mediators of obesity-induced inflammation; the transcriptional effect of estrogens on gene expression; and the role of estrogens in regulating the gender disparity of hepatocellular carcinoma.