Related by context. Frequent words. (Click for all words.) 73 Cloning 72 cloned 72 human cloning 65 therapeutic cloning 61 human embryos 59 embryonic stem cells 59 stem cell 58 embryos 58 embryonic stem cell 56 stem cell research 56 embryo 55 clone 54 genetic modification 54 embryonic cells 53 clones 53 human embryonic stem 51 Stem cell 51 stem cells 50 transgenic 50 genetically modified 50 genetically engineered 49 artificial insemination 49 vitro fertilization 48 adult stem cells 48 stem cell therapy 47 adult stem cell 46 IVF 46 cloned animals 46 HFEA 45 Stem Cell Research 45 iPS cells 45 implanting 45 bioethics 45 surrogacy 45 breeders 45 genetically altered 44 Hwang 43 genetically modified crops 43 embryonic 43 ethicists 43 synthetic biology 43 fertility treatments 43 regenerative medicine 42 gene therapy 42 genetically modified foods 42 fertilized egg 42 euthanasia 41 genetically engineered crops 41 Advanced Cell 41 fertilized eggs 41 breeding 41 Bioethics 41 genome sequencing 41 frozen embryos 40 genetically modified GM 40 organ transplantation 39 eugenics 39 Euthanasia 39 fertilization 39 DNA sequencing 39 veterinary medicine 39 adoption 39 Human Fertilisation 39 fertility clinics 39 Genetics 39 mad cow 39 biotech crops 39 greyhound racing 39 geneticists 38 biomedical research 38 transplantation 38 Stem Cell 38 Embryonic stem cells 38 reprogramming 38 mad cow disease 38 microchip 38 GMOs 38 organ transplants 38 PGD 38 genetics 38 castration 38 infertility 38 sterilization 37 patenting 37 breeder 37 microchips 37 DNA testing 37 personhood 37 Stem Cells 37 Clone 37 suk 37 scientists 37 adoptions 36 genomics 36 beef imports 36 commercial whaling 36 reproductive 36 GMO 36 experiments 36 abortion 36 Fertility