Embryo experiments.
D037881:Aborted Fetus; D033421:Beginning of Human Life; D033041:Embryo Research; D004622:Embryo, Mammalian; D004992:Ethics, Medical; D033042:Fetal Research; D006805:Human Experimentation; D006801:Humans; D007883:Legislation, Medical; D019369:Life; D013997:Time Factors; D006113:United Kingdom