Microorchidism is a genetic disorder found in males, characterized by abnormally small
testes. The condition is associated with (and often secondary to) a number of other genetic disorders, including
Klinefelter's Syndrome and
Prader-Willi syndrome, as well as other multiple malformation disorders. The degree of abnormality (or otherwise) of the testes can be determined by the use of an
orchidometer. In addition, Microorchidism may also occur as a result of shrinkage or
atrophy of the testis due to infections like
mumps.