![]() ![]() ![]() In the neonate marked changes in adrenal and thyroid function occur with birth. Concentrations of HPA and HPT axis hormones are altered in pregnant women and neonates. Disorders of these systems are associated with infertility, alterations in normal changes at puberty, and complications of pregnancy. The hormones of the HPA and HPT axes (see Figure 2-7) are necessary for many body functions, for development of the central nervous system (CNS) and other growth processes, and for reproductive function. ![]() HPA axis function in the mother and fetus are closely interrelated with placental function. Pituitary, adrenal, and thyroid function and the hypothalamic-pituitary-adrenal (HPA) and hypothalamic-pituitary-thyroid (HPT) axes are critical for normal function and adaptation during pregnancy, growth, and development of the fetus, and adaptation of the newborn to the extrauterine environment. CHAPTER 19 Pituitary, adrenal, and thyroid function ![]()
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