Embryos untouched.
D033421:Beginning of Human Life; D033041:Embryo Research; D004622:Embryo, Mammalian; D004989:Ethics; D005307:Fertilization in Vitro; D033161:Government Regulation; D006801:Humans; D007878:Legislation as Topic; D019369:Life; D028723:Personhood; D006113:United Kingdom