title: Studies on the oestrus and ovarian activity during five successive oestrous cycles in gilts.
mesh_terms: D000818:Animals; D004971:Estrus; D005260:Female; D010053:Ovary / Q000502:physiology*; D011247:Pregnancy; D011374:Progesterone / Q000097:blood; D013552:Swine / Q000502:physiology*
chemical_list: D011374:Progesterone