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Testosterone is the primary male sex hormone and androgen in males. [3] In humans, testosterone plays a key role in the development of male reproductive tissues such as testicles and prostate, as well as promoting secondary sexual characteristics such as increased muscle and bone mass, and the growth of body hair.
[1] [2] This includes the embryological development of the primary male sex organs, and the development of male secondary sex characteristics at puberty. Androgens are synthesized in the testes, the ovaries, and the adrenal glands. Androgens increase in both males and females during puberty. [3] The major androgen in males is testosterone. [4]
The following is a list of hormones found in Humans. Spelling is not uniform for many hormones. Spelling is not uniform for many hormones. For example, current North American and international usage uses [ citation needed ] estrogen and gonadotropin, while British usage retains the Greek digraph in oestrogen and favours the earlier spelling ...
[5] [3] Sexual differentiation is a process by which hormones determine anatomic phenotype, mainly the development of the reproductive organs. [6] DHT is the most important androgenic hormone and is a product of both canonical and backdoor pathways. [ 7 ]
Male development can only occur when the fetal testis secretes key hormones at a critical period in early gestation. The testes begin to secrete three hormones that influence the male internal and external genitalia: they secrete anti-Müllerian hormone (AMH), testosterone, and dihydrotestosterone (DHT). Anti-Müllerian hormone causes the ...
During puberty, a male's erect penis becomes capable of ejaculating semen and impregnating a female. [26] [27] A male's first ejaculation is an important milestone in his development. [28] On average, a male's first ejaculation occurs at age 13. [29] Ejaculation sometimes occurs during sleep; this phenomenon is known as a nocturnal emission. [25]
FSH plays a role in the spermatogenic capacity of the adult male as it controls the proliferation of Sertoli cells during either the perinatal or pubertal period, or both. [3] However, testosterone has been found to be the most important hormone that is responsible for both the initiation and the maintenance of spermatogenesis. [4]
These hormones are specific to mammals and are not found in other vertebrates [1] —this is because neohormones are evolved to enhance specific mammalian functions. [2] In males, neohormones play important roles in regulating testicular descent (the testes descend into the scrotum during foetal development) and preparing the sperm for internal ...