title: Embryos, preembryos, and stem cells.
authors.forename: Desislava M
authors.initials: DM
authors.lastname: Tacheva
authors.forename: Iavor K
authors.initials: IK
authors.lastname: Vladimirov
mesh_terms: D001755:Blastocyst / Q000502:physiology*; D005314:Embryonic and Fetal Development / Q000502:physiology*; D006801:Humans; D013234:Stem Cells / Q000502:physiology*