title: Total thyroxine and free thyroxine index in plasma of dairy cows in relation to strength of heat.
mesh_terms: D000818:Animals; D002417:Cattle; D004971:Estrus; D004972:Estrus Detection; D005260:Female; D007315:Insemination, Artificial / Q000662:veterinary; D011247:Pregnancy; D013974:Thyroxine / Q000097:blood*
chemical_list: D013974:Thyroxine