title: Annual cycle of plasma luteinizing hormone and sex hormones in male and female mallards (Anas platyrhynchos).
mesh_terms: D000818:Animals; D001835:Body Weight; D013196:Dihydrotestosterone / Q000097:blood*; D004372:Ducks / Q000502:physiology*; D004958:Estradiol / Q000097:blood*; D004970:Estrone / Q000097:blood*; D005260:Female; D007986:Luteinizing Hormone / Q000097:blood*; D008297:Male; D010058:Oviposition; D010507:Periodicity; D011374:Progesterone / Q000097:blood*; D012621:Seasons; D012737:Sex Factors; D013739:Testosterone / Q000097:blood*
chemical_list: D013196:Dihydrotestosterone; D004970:Estrone; D013739:Testosterone; D011374:Progesterone; D004958:Estradiol; D007986:Luteinizing Hormone