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Human growth hormone is a hormone secreted by the pituitary gland that primarily affects the growth of every individual. This hormone, together with thyroid and sex hormones, determine the final height of a human. HGH production rapidly increases during the childhood and puberty years. It is also commonly secreted at the start of sleep and is secreted in burst.
HGH is found in every individual. It is unique in every species therefore; human growth hormones are different from animal growth hormones. There is a fixed range of HGH that needs to be present in an individual to be able to optimize his potential for growth. However, not all individuals have the right number of hormones to grow normally. There are cases where in HGH is deficient or excessive. The excess or deficiency in HGH results to diseases and affects the human’s growth.
Growth hormone deficiency can happen in both children and adults. Children with brain tumors, Prader Wili syndrome and genetic defects are at risk to have this deficiency. Growth hormone deficiency in children often results to growth abnormalities which are composed of delayed teenage years, delayed secondary tooth eruption and short physique. Growth hormone deficiency can be classified into four types:
1.) Classic
2.) Hypothalamic
3.) Functional
4.) Idiopathic
Classic GHD is often referred to as pituitary GHD and comprises of the inability of the pituitary gland to produce growth hormone. The malfunction of the hypothalamus to make or spread the neuroendocrine messaging hormone characterizes the Hypothalamic GHD. Functional GHD is the break down of other hormone and functions of metabolism that causes the incapability of the pituitary gland to utilize or secrete growth hormones.
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