title: PRELIMINARY APPRAISAL OF THE ROLE OF SEMINAL PEPSINOGEN I IN HUMAN STERILITY.
mesh_terms: D001826:Body Fluids; D055598:Chemical Phenomena; D002621:Chemistry; D004792:Enzyme Precursors; D006801:Humans; D007246:Infertility; D007248:Infertility, Male; D010434:Pepsin A; D020116:Pepsinogen A; D012661:Semen
chemical_list: D004792:Enzyme Precursors; D020116:Pepsinogen A; D010434:Pepsin A
keywords: CHEMISTRY; ENZYME PRECURSORS; PEPSIN; SEMEN; STERILITY, MALE