In azoospermic infertile men with varicocele, testicular biopsy revealed histopathologic patterns that varied from disorganized spermatogenesis with low or moderate sperm scores to early (primary spermatocytes stage) or late (spermatid stage) arrested spermatogenesis or germ cell aplasia and Sertoli cells only. Diagnostic testicular biopsy can be helpful for accurate management of azoospermic i...

Neither Kellogg7 nor Belding' in their papers on the biology of V. mercenaria give a description of spermatogenesis occurring in this animal, and until the present time the general features of this process in dams have not been described. In the case of some other lamellibranchiate mollusks, more information on the development of the gonad and gamete formation is available. Hoek' described the ...