title: Blastogenesis and the "primary field" in human development.
authors.affiliation: Department of Medical Genetics, Shodair Children's Hospital, Helena, MT 59604.
authors.forename: J M
authors.initials: JM
authors.lastname: Opitz
mesh_terms: D002454:Cell Differentiation / Q000235:genetics / Q000502:physiology; D000013:Congenital Abnormalities / Q000196:embryology / Q000235:genetics; D004622:Embryo, Mammalian / Q000502:physiology*; D005314:Embryonic and Fetal Development / Q000235:genetics / Q000502:physiology*; D006803:Human Development; D006801:Humans; D009024:Morphogenesis / Q000235:genetics / Q000502:physiology