Related by context. Frequent words. (Click for all words.) 69 human embryos 66 embryonic stem cells 65 embryonic cells 63 embryonic stem cell 61 therapeutic cloning 59 embryos 59 adult stem cells 58 embryo 57 human embryonic stem 55 human cloning 55 adult stem cell 55 cloning 54 stem cell research 54 stem cells 53 stem cell 52 Stem cell 49 iPS cells 49 vitro fertilization 49 frozen embryos 48 Cloning 48 fertilized egg 47 stem cell therapies 46 Embryonic stem cells 45 Advanced Cell 44 embryonic 44 fertilized eggs 43 genetic modification 42 genetically engineered 42 stem cell therapy 42 genetically modified 42 ethicists 41 umbilical cord blood 41 gene therapy 41 vitro fertilization IVF 40 Stem cells 40 regenerative medicine 40 aborted fetuses 40 fertility treatments 40 bone marrow transplants 40 Michael Schiavo 39 PGD 39 Stem Cell Research 39 ovaries 39 abortion 39 insulin producing 39 HFEA 39 fetuses 39 infertile couples 39 genetically engineered crops 38 Human Fertilisation 38 enhanced interrogation techniques 38 Terri Schiavo 38 cloned 38 genetically altered 38 organ transplants 38 genetically modified foods 38 transgenic 38 contraception 38 Abortion opponents 38 cloned animals 38 synthetic biology 38 comparative effectiveness 37 harsh interrogation techniques 37 bioethics 37 harsh interrogation methods 37 Stem Cells 37 waterboarding 37 Roe v. Wade 37 genetically modified crops 37 Abortion 37 biomedical research 36 fertility clinics 36 reproductive 36 implanting 36 emergency contraception 36 ethical 36 IVF 36 unborn babies 36 Stem Cell 36 sex marriage 36 Bioethics 36 fetus 36 transplantation 36 flu vaccines 36 pro lifers 35 feeding tubes 35 banning gay marriage 35 gay marriage 35 judicial nominees 35 vitro 35 unborn 35 civil unions 35 legalizing gay marriage 35 creationism 35 partial birth 35 biotech crops 35 heterosexual couples 35 RNA interference 35 ethically 35 invasive procedure 35 feeding tube