Ossification of the atlas-axis complex in the dog.
D000375:Aging; D000818:Animals; D000831:Animals, Newborn; D001368:Axis, Cervical Vertebra / Q000033:anatomy & histology / Q000196:embryology / Q000254:growth & development*; D001846:Bone Development; D001270:Cervical Atlas / Q000033:anatomy & histology / Q000196:embryology / Q000254:growth & development*; D004285:Dogs; D004622:Embryo, Mammalian; D005260:Female; D008297:Male; D010012:Osteogenesis; D011247:Pregnancy