n. the operation of connecting the vas deferens to the epididymis to bypass obstruction of the latter in an attempt to cure *azoospermia caused by this blockage. It is also performed to reverse vasectomy as an alternative to *vasovasostomy.
(aspermia) n. the complete absence of sperm from the seminal fluid. This is due either to profound impairment of sperm formation (*spermatogenesis) due to damage to the testes (e.g. caused by *cryptorchidism, mumps *orchitis, or radio- or chemotherapy) or – more commonly – to obstruction of the genital tract (e.g. resulting from vasectomy, gonorrhoea, or Chlamydia infection). A biopsy of the testis is necessary in order to differentiate these two causes of azoospermia; if a blockage is present it may be possible to relieve it surgically (see epididymovasostomy).... azoospermia
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