Placental Synthesis of Steroid Hormones. Placental Polypeptides. Pregnancy-Related Changes in the Metabolism of Hormoes. Endocrine Pancreas and Mmaternal Metabolism. Hypertentsion in Pregnancy. The Renin. Angiotensin. Aldosterone System and Vasopressin. The Maternal Adenohypophysis. The Maternal Thyroid and Parathyroid Glands. The Maternal Adrenal Cortex. The Maternal Ovaries. Postpartum Lactation and Resumption of Reproductive Functions. The Human Fetal Hypothalamus and Pituitary Gland: The Maturation of Neuroendocrine Mechanisms Controlling the Secretion of Fetal Pituitary Growth Hormone, Prolactin, Gonadotropins, Adrenocorticotropin-Related Peptides and Thyrotropin. The Fetal-Maternal Neurohypophyseal System. The Fetal Adrenal. The Fetal Gonad and Sexual Differentiation. The Ontogenesis of Thyroid Function and Actions. Endocrinology of Implantation. Maintenance of Pregnancy and the Initiation of Normal and Premature Labor. The Influence of Hormones on Fetal Lung Develoment. Carbohydrate Metabolism: Insulin and Glucagon. Perinatal Mineral Metabolism. Newborn Adaptation: Adrenocortical Hormones and Adrenocorticotropic Hormone.