title: The burden of proof.
authors.affiliation: National Civic Council, Perth, Australia.
authors.forename: Richard
authors.initials: R
authors.lastname: Egan
authors.forename: William B
authors.initials: WB
authors.lastname: Hurlbut
mesh_terms: D033421:Beginning of Human Life; D004622:Embryo, Mammalian / Q000166:cytology*; D047108:Embryonic Development / Q000235:genetics; D005260:Female; D006801:Humans; D053652:Nuclear Transfer Techniques; D018587:Oocyte Donation / Q000941:ethics; D035845:Research Embryo Creation / Q000941:ethics* / Q000379:methods*; D013234:Stem Cells