Anorchia, is a medical condition where both testes are absent at birth. Within a few weeks of fertilization, the embryo develops rudimentary sex organs, which are crucial to the development of the reproductive system. In the human male, if these fail to develop within 8 weeks, the baby will have female genitalia. If the testes are lost between 8 and 10 weeks, the baby will have ambiguous genitalia when it's born. However, if the testes are lost after 14 weeks, the baby will have a normal male reproductive system, other than the absence of testes. Human male anatomy The testicles, known medically as testes (singular testis), are the male generative glands in animals. ... Categories: Biology stubs ... A sex organ, or primary sexual characteristic, narrowly defined, is any of those parts of the body (which are not always bodily organs according to the strict definition) which are involved in sexual reproduction and constitute the reproductive system in an complex organism; namely: Male: penis (notably the glans penis... It has been suggested that this article or section be merged into sex organ. ... The mirror of the Roman Goddess Venus is often used to represent the female sex. ... An intersexual is a person (or individual of any unisexual species) who is born with genitalia and/or secondary sexual characteristics of indeterminate sex, or which combine features of both sexes. ... Born can mean: Childbirth Born, Netherlands Max Born Born, Luxembourg This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ...
Other names for anorchia include
congenital anorchia,
vanishing testes syndrome
vanishing testes,
empty scrotum,
testicular regression syndrome (TRS).
References
"Anorchia." University of Maryland Medical Center. URL accessed on January 25, 2006.
However, if the testes are lost after the critical phase of male differentiation between 12 and 14 weeks, the baby will have normal male internal and external genitalia (penis and scrotum), but the testes will be absent.
This is known as congenital anorchia, or the "vanishing testes syndrome."