Related by context. Frequent words. (Click for all words.) 75 therapeutic cloning 71 somatic cell nuclear 69 embryonic stem cell 69 reproductive cloning 67 human cloning 67 cloned embryos 67 human embryos 65 embryonic stem cells 63 stem cell research 63 embryo 63 embryonic cells 63 destroying embryos 63 cloning 62 stem cell 62 embryos 62 adult stem cells 62 human embryonic stem 58 stem cells 58 adult stem cell 57 stem cells derived 56 Stem Cell Research 56 parthenogenesis 55 stem cell therapies 55 pluripotent stem cells 55 ES cells 55 Cloning 55 Embryos 55 iPS cells 54 fertilized egg 53 Stem cell 53 induced pluripotent stem cells 52 vitro fertilization 52 IVF 52 assisted reproduction 51 PGD 51 embryonic 51 vitro fertilization IVF 51 oocytes 51 fertilized eggs 51 HFEA 51 pluripotent 51 genetic modification 50 infertile couples 50 fertility treatments 50 fertility clinics 50 Stem Cell 50 gene therapy 50 stem cell therapy 49 assisted reproductive 49 bioethicists 49 regenerative medicine 48 germ cells 48 frozen embryos 48 abortions 47 Stem Cell Biology 47 transgenic 47 virgin birth 47 stem cell transplantation 47 ovarian tissue 47 organ transplants 47 Bioethics 46 vitro 46 partial birth 46 Human Fertilisation 45 recombinant DNA 45 aborted fetuses 45 Abortion 45 genetic abnormalities 45 bone marrow transplants 45 retrovirus 45 biomedical research 45 abortion 45 bone marrow stem cells 44 Advanced Cell 44 retroviruses 44 terminate pregnancy 44 StemCells 44 Harvard Stem Cell 44 genetic manipulation 44 transplantation 44 artificial insemination 44 surrogacy 44 assisted suicides 44 organ transplantation 44 islet cells 44 procreation 43 stem cell biology 43 Embryology Authority 43 bone marrow transplantation 43 islet cell 43 mifepristone 43 genetically altered 43 insulin producing 43 neural stem cells 43 cloned 43 voluntary euthanasia 43 genetically engineered 43 genetically identical 43 translational research 42 pro lifers 42 stem cell transplants