following the treatment , the activity of spermatogenesis ( expressed as the mean number of seminiferous tubules containing mature sperm and epididymal sperm count ) was inhibited while the testis weight was not reduced , obviously due to an absolute increase of the interstitial tissue which was a marked histological feature of the testes , particularly following the higher doses of sch 13521 .
C0037864
spermatogenesis
C0039597
testis