OBJECTIVE To investigate the damage of di-(2-ethylhexyl) phthalate(DEHP) on the morphological ultrastructure of mouse testis and the protective effects of Blegent(compound Y523) on mouse spermatogonia and sertoli cells. METHODS Fifty-five male mice were randomly divided into three groups: DEHP, Y523 and control group. DEHP dissolved in soya oil was given at the dose of 0, 10, 20, 50 and 100 mg·kg-1·d-1 for 30 d by intragastric administration consecutively in DEHP group. Blegent at the dose of 1 000 mg was m...