[Embryonic engineering].
D000818:Animals; D001921:Brain / Q000166:cytology; D002454:Cell Differentiation; D002455:Cell Division; D006412:Hematopoietic Stem Cells / Q000166:cytology; D006801:Humans; D009432:Neural Crest / Q000166:cytology; D015202:Protein Engineering; D013234:Stem Cells / Q000166:cytology; D013724:Teratoma / Q000473:pathology