title: Transport and transformation of steroids in the seminiferous tubules.
mesh_terms: D000818:Animals; D001693:Biological Transport, Active; D012739:Gonadal Steroid Hormones / Q000378:metabolism*; D008297:Male; D011372:Progestins / Q000378:metabolism; D051381:Rats; D013737:Testis / Q000378:metabolism*
chemical_list: D012739:Gonadal Steroid Hormones; D011372:Progestins