title: Ovarian hormones and retention of learned fear in rats.
mesh_terms: D000818:Animals; D001362:Avoidance Learning / Q000502:physiology*; D003214:Conditioning, Classical; D003463:Cues; D004971:Estrus; D005239:Fear / Q000502:physiology*; D005260:Female; D008568:Memory / Q000502:physiology*; D010053:Ovary / Q000502:physiology*; D011247:Pregnancy; D011374:Progesterone / Q000502:physiology; D051381:Rats; D012153:Retention, Psychology / Q000502:physiology*
chemical_list: D011374:Progesterone