Related by context. Frequent words. (Click for all words.) 73 cloning 58 cloned embryos 57 somatic cell nuclear 56 Embryo 56 human cloning 54 reproductive cloning 54 cloned 54 therapeutic cloning 53 Embryos 53 human embryos 53 Embryonic stem cell 50 genetic modification 50 Stem cell 50 embryo 49 embryonic stem cells 48 destroying embryos 48 embryos 48 clone 47 Stem Cell Research 46 pluripotent stem cells 46 genetic manipulation 46 genetically engineered 46 stem cell 45 Abortion 45 Genetic 44 genetically modified 44 transgenic 44 induced pluripotent stem cells 44 Euthanasia 44 Stem Cell 43 Sequencing 43 clones 43 embryonic cells 43 Genetics 43 embryonic stem cell 43 parthenogenesis 43 stem cells 42 Stem Cells 42 ES cells 42 stem cell research 41 Infertility 41 Hwang Woo suk 41 fertilized egg 41 adult stem cells 41 assisted reproduction 41 genetically identical 41 genetically altered 40 iPS cells 40 Embryology 40 Proliferation 40 Fertility 40 breeders 40 Mad Cow Disease 39 human embryonic stem 39 stem cell therapy 39 ethicists 39 Labeling 39 Contraception 39 bioengineered 39 Clone 39 Silencing 38 gene therapy 38 Storing 38 recombinant DNA 38 Spying 38 oocytes 38 selective breeding 38 Bovine 38 HFEA 38 IVF 38 adult stem cell 38 Bioethics 38 vitro fertilization 38 Breeding 38 genetics 37 synthetic biology 37 Advanced Cell 37 Darwinian evolution 37 crossbreeding 37 geneticists 37 Abortions 37 stem cells derived 37 artificial insemination 37 stem cell therapies 37 bone marrow transplantation 37 Transplantation 37 Killing 37 scientist Hwang Woo 36 embryology 36 Copying 36 Embryology Authority 36 Schatten 36 Harvesting 36 regenerative medicine 36 Burying 36 gene sequences 36 Human Fertilisation 36 embryonic 36 Downloading 36 Stem cells 36 fertilized eggs