title: Letter: Oestrous cycles in swes grazing different cultivars of subterranean clover.
mesh_terms: D000818:Animals; D004967:Estrogens; D004971:Estrus; D005260:Female; D010945:Plants, Edible; D011247:Pregnancy; D012756:Sheep / Q000502:physiology*
chemical_list: D004967:Estrogens