Related by context. Frequent words. (Click for all words.) 66 embryonic stem cells 66 adult stem cells 65 stem cells 62 embryonic cells 59 stem cells derived 58 human embryos 58 SCNT 58 pluripotent stem cells 57 Adult stem cells 57 iPS cells 57 stem cell 57 embryos 56 destroying embryos 56 transgenic animals 56 stem cell therapies 56 therapeutic cloning 56 embryonic stem cell 55 cloned embryos 55 embryo 55 somatic cell nuclear 55 cell transplantation 55 reprogrammed cells 55 iPSCs 54 leftover embryos 54 bone marrow stem cells 54 ESCs 54 stem cell research 54 cloned embryo 53 adult stem cell 53 stem cell therapy 53 iPS cell 53 hESC 53 iPS 53 oocytes 52 ES cells 52 human embryonic stem 52 induced pluripotent stem cells 52 Embryonic stem cell 52 fetal tissue 52 human cloning 51 gene therapy 50 reproductive cloning 50 viral vectors 50 vitro assays 50 human reproductive cloning 49 Stem cell 49 chimeras 49 mouse embryos 49 islet cells 49 fertilized embryos 49 retinal cells 48 vitro 48 hESCs 48 neural stem cells 48 genetically modified mice 48 curing diseases 48 cloning 48 pancreatic cells 48 ovarian tissue 48 ESCR 48 TB4 48 germ cells 47 Stem cells 47 Tβ4 47 laboratory experiments 47 oncolytic viruses 47 genetically engineered mice 47 regenerative medicine 47 calcitonin 47 aneuploidy 47 hematopoietic stem cells 46 human neural stem 46 parthenogenesis 46 prostate tissue 46 insulin producing 46 prion diseases 46 Embryonic stem cells 46 antisense drugs 46 somatic cells 46 Embryos 46 frozen embryos 46 cultured cells 46 embryonic 46 vitro studies 46 fertility treatments 46 vitro fertilization 46 gene expression profiling 46 infertility treatments 45 GDNF 45 mouse embryonic stem 45 stem cell biology 45 transgenic 45 vitro fertilization IVF 45 tissue 45 fluorescent proteins 45 amniotic fluid 44 genetic abnormalities 44 mesenchymal stem cells 44 clinical trials 44 stem cell transplantation 44 nutrigenomics