title: Embryonic questions.
authors.forename: T M
authors.initials: TM
authors.lastname: Beardsley
mesh_terms: D005333:Fetus; D006805:Human Experimentation; D006801:Humans; D009417:Nerve Tissue / Q000637:transplantation; D010300:Parkinson Disease / Q000601:surgery; D011640:Public Policy; D014481:United States