title: Supplementary rib formation: spontaneous anomaly or teratogenic effect.
mesh_terms: D000014:Abnormalities, Drug-Induced / Q000209:etiology*; D000818:Animals; D005260:Female; D051379:Mice; D011247:Pregnancy; D011817:Rabbits; D051381:Rats; D012272:Ribs / Q000002:abnormalities*