title: Testosterone secretion and plasma luteinizing hormone concentration during a sexual cycle in the Pekin duck, and after thyroxine treatment.
mesh_terms: D000818:Animals; D004372:Ducks / Q000502:physiology*; D007986:Luteinizing Hormone / Q000097:blood*; D008297:Male; D008657:Metabolic Clearance Rate; D009929:Organ Size; D012621:Seasons; D013737:Testis / Q000502:physiology; D013739:Testosterone / Q000097:blood / Q000378:metabolism*; D013974:Thyroxine / Q000494:pharmacology*
chemical_list: D013739:Testosterone; D007986:Luteinizing Hormone; D013974:Thyroxine