Related by context. Frequent words. (Click for all words.) 59 cloning 58 human cloning 55 embryonic stem cells 55 embryonic cells 54 stem cell research 53 embryonic stem cell 53 human embryos 53 therapeutic cloning 53 stem cell 51 cloned embryos 51 Cloning 51 Stem cell 50 human embryonic stem 50 genetic modification 49 somatic cell nuclear 49 reproductive cloning 48 embryo 48 genetic manipulation 48 adult stem cells 48 embryos 48 stem cell therapies 48 gene therapy 47 stem cells 47 transgenic 46 stem cells derived 46 genetically modified 45 biomedical research 45 Stem Cell Research 44 vitro fertilization 44 embryonic 44 adult stem cell 44 genetically engineered 44 genetically modified crops 44 stem cell therapy 43 induced pluripotent stem cells 43 bioethics 43 fertility treatments 43 assisted reproduction 42 genetically modified foods 42 scientific 42 stem cell biology 42 IVF 42 genetically modified corn 42 cloned 42 Stem Cells 42 genetically engineered crops 42 regenerative medicine 41 ethicists 41 bioengineered 41 synthetic biology 41 Advanced Cell 41 Stem Cell 41 oocytes 41 Gene Therapy 40 genetically modified GM 40 ES cells 40 genetically altered 40 biotechnologies 40 abortion 40 NIH 40 ethical 40 fertilized egg 40 Abortion 40 ethicist 39 iPS cells 39 Bioethics 39 geneticists 39 Darwinian evolution 39 scientists 39 Schatten 39 organ transplantation 39 organ transplants 38 bioethicist 38 biotechnological 38 scientific discoveries 38 biotech crops 38 fertilized eggs 38 fertility clinics 38 experiments 38 HFEA 38 genomics 38 vitro fertilization IVF 38 artificial insemination 37 abortions 37 biotech 37 biomedical 37 Regenerative Medicine 37 contraception 37 DNA sequencing 37 gay marriage 37 assisted suicides 37 vitro 37 transplantation 37 fertility 37 cellulosic ethanol 37 fertility clinic 37 biotechnology 37 Reproductive Medicine 36 infertility 36 reproductive 36 comparative effectiveness