title: Semen studies on phenylketonurics.
mesh_terms: D000328:Adult; D006801:Humans; D008297:Male; D010649:Phenylalanine / Q000097:blood; D010661:Phenylketonurias / Q000378:metabolism*; D012661:Semen / Q000032:analysis* / Q000166:cytology; D013076:Sperm Count
chemical_list: D010649:Phenylalanine