title: Further evidence for reciprocal interactions between the annual sexual and thyroid cycles in male Peking ducks.
mesh_terms: D000818:Animals; D002369:Castration; D004372:Ducks; D007986:Luteinizing Hormone / Q000097:blood; D008297:Male; D010507:Periodicity; D012098:Reproduction; D012621:Seasons; D013739:Testosterone / Q000097:blood; D013961:Thyroid Gland / Q000502:physiology*; D013965:Thyroidectomy
chemical_list: D013739:Testosterone; D007986:Luteinizing Hormone