title: Increasing ovulation rate in sheep by active immunisation against an ovarian steroid androstenedione.
mesh_terms: D000735:Androstenedione / Q000276:immunology*; D000818:Animals; D000937:Antigen-Antibody Reactions; D004971:Estrus; D005260:Female; D007114:Immunization; D007986:Luteinizing Hormone / Q000097:blood; D010060:Ovulation; D011247:Pregnancy; D011374:Progesterone / Q000097:blood; D012756:Sheep
chemical_list: D000735:Androstenedione; D011374:Progesterone; D007986:Luteinizing Hormone