title: Production of an extra summer crop of lambs.
mesh_terms: D000818:Animals; D001947:Breeding; D005260:Female; D005298:Fertility; D012739:Gonadal Steroid Hormones / Q000008:administration & dosage; D011247:Pregnancy; D012621:Seasons; D012756:Sheep / Q000502:physiology*
chemical_list: D012739:Gonadal Steroid Hormones