Technical advances in microsurgery have produced a calculable success
rate for reconstructive surgery in cases of obstructive azoospermia. N
evertheless, in standardized vasovasostomy and tubulovasostomy, the di
fferent outcomes for patency and pregnancy indicate that further compr
ehensive clinical and basic scientific studies are required to improve
the results of surgery. The aspiration of epididymal and testicular s
permatozoa in combination with intra-cytoplasmic sperm injection (ICSI
) is one example of a fruitful integration of microsurgery into new ar
eas of reproductive medicine. Where there is ejaculatory duct obstruct
ion, the continuity with the posterior urethra can be restored by a tr
ansurethral operation.