Related by context. Frequent words. (Click for all words.) 63 cloned embryos 62 therapeutic cloning 61 SCNT 61 cloned embryo 60 embryonic stem cells 59 human embryos 59 stem cells 58 embryonic cells 58 transgenic animals 57 embryos 57 reproductive cloning 57 stem cell 57 leftover embryos 56 Embryology Authority 56 fertilized embryos 56 somatic cell nuclear 55 cloning 55 human cloning 55 human reproductive cloning 55 human embryonic stem 54 Embryology Authority HFEA 54 fertilized eggs 54 iPSCs 53 embryo 53 stem cell research 53 stem cells derived 53 Wilmut 53 pluripotent stem cells 53 Embryonic stem cell 53 adult stem cells 53 Embryos 53 embryonic stem cell 52 Roslin Institute 52 iPS cells 52 Human Embryonic Stem 52 genetically engineer 52 genetically engineered 51 chimeras 51 fetal tissue 51 Embryonic Stem Cell 51 ES cells 51 HFEA 50 induced pluripotent stem cells 50 Human Fertilisation 50 cloned sheep 50 Stem cell 50 iPS cell 50 hESC 50 stem cell therapies 49 motor neuron disease 49 destroying embryos 49 embryology 49 Embryo 49 hESCs 49 embryonic 49 gene therapy 49 Embryonic stem cells 48 Adult stem cells 48 neural stem cells 48 Cloning 48 Stem Cell Research 48 genetically engineered mice 48 Stem Cell 48 genetically altered 48 reprogrammed cells 48 ovarian tissue 48 parthenogenesis 47 germ cells 47 adult stem cell 47 ESCs 47 Stem Cell Institute 47 Embryology Bill 47 reproductive biology 47 SCIENTISTS 47 cloned 47 genetically modified 47 stem cell biology 47 insulin producing 46 stem cell therapy 46 IVF 46 Human Tissue 46 motor neurone disease 46 cell transplantation 46 somatic cells 46 ReNeuron 46 IVF treatment 46 human neural stem 46 mouse embryos 46 pancreatic cells 46 genetically identical 46 fertilized egg 46 Stem Cells 46 Biological Sciences Research 46 bone marrow stem cells 46 Mesoblast 46 genetically modified mice 45 pre implantation genetic 45 mouse embryonic stem 45 IVF clinics 45 gametes 45 vitro fertilization