title: Seasonal variation in plasma androgens and testosterone in the North American wild horse.
mesh_terms: D000728:Androgens / Q000097:blood*; D000818:Animals; D006736:Horses / Q000097:blood*; D008297:Male; D012621:Seasons; D013739:Testosterone / Q000097:blood*
chemical_list: D000728:Androgens; D013739:Testosterone