a condition in which the male testes fail to descend into the scrotum is called castration.
a condition in which the male testes fail to descend into the scrotum is called castration.
a condition in which the male testes fail to descend into the scrotum is called?
castration
the testes remain high in the abdomen until the seventh month of gestation, when they move from the abdomen through the inguinal canals into the two sides of the scrotum. movement has been proposed to occur in two phases, under the control of somewhat different factors. the first phase, movement across the abdomen to the entrance of the inguinal canal, appears controlled (or at least greatly influenced) by anti-müllerian hormone (amh). the second phase, in which the testes move through the inguinal canal into the scrotum, is dependent on androgens (most importantly testosterone). in rodents, androgens induce the genitofemoral nerve to release calcitonin gene-related peptide, which produces rhythmic contractions of the gubernaculum, a ligament which connects the testis to the scrotum, but a similar mechanism has not been demonstrated in humans. maldevelopment of the gubernaculum, or deficiency or insensitivity to either amh or androgen can, therefore, prevent the testes from descending into the scrotum. some evidence suggests an additional paracrine hormone, referred to as descendin, may be secreted by the testes.
cryptorchidism
anorchia (also called anorchidism or anorchism) is a disorder of sex development in which a person with xy karyotype, which usually corresponds to male sex, is born without testes. within a few weeks of fertilization, the embryo develops rudimentary gonads (testes), which produce hormones responsible for the development of the reproductive system. if the testes fail to develop within eight weeks, the baby will develop female genitalia (see swyer syndrome). if the testes begin to develop but are lost or cease to function between eight and 10 weeks, the baby will have ambiguous genitalia when it is born. however, if the testes are lost after 14 weeks, the baby will have partial male genitalia with the notable absence of gonads.
anorchia