Related by context. Frequent words. (Click for all words.) 61 stem cells 58 cloned embryo 57 cloned embryos 57 embryonic stem cells 55 human embryos 55 stem cells derived 55 adult stem cells 54 SCNT 54 embryos 54 embryonic cells 54 pluripotent stem cells 54 fertilized embryos 54 therapeutic cloning 53 stem cell 52 induced pluripotent stem cells 52 somatic cell nuclear 51 mouse embryos 51 Adult stem cells 51 embryo 51 Embryos 51 iPSCs 50 blastocysts 50 transgenic animals 50 human embryonic stem 50 fertilized eggs 50 bone marrow stem cells 50 genetically engineer 50 Embryonic stem cells 50 fetal tissue 49 ESCs 49 neural stem cells 49 ES cells 48 iPS 48 somatic cells 48 iPS cells 48 vitro fertilization 47 ovarian tissue 47 islet cells 47 iPS cell 47 cloning 47 cloned 47 embryonic 47 gametes 47 transgenic mice 47 Stem cells 46 cloned sheep 46 cell transplantation 46 vitro fertilization IVF 46 embryonic stem cell 46 Roslin Institute 46 reprogrammed cells 46 Embryology Authority 46 pancreatic cells 46 chimeras 45 cells 45 insulin producing 45 oocytes 45 hESCs 45 IVF treatment 45 germ cells 45 regrow 45 Wilmut 45 stem cell research 44 fertilized egg 44 Harvard Stem Cell 44 destroying embryos 44 stem cell therapy 44 tissue 44 mouse embryonic stem 44 Cord blood 44 synthesise 44 reproductive cloning 44 parthenogenesis 44 diseased cells 44 retinal cells 44 tissue transplants 44 diabetic mice 44 genetically modified mice 44 Embryonic stem cell 44 bone marrow transplants 43 conceive naturally 43 bioengineer 43 hematopoietic stem cells 43 sperm 43 IVF 43 ovary 43 human cloning 43 pluripotent 43 HSCs 43 hESC 43 adult stem cell 43 genetically engineered 43 bone marrow derived 43 progenitor cells 43 progenitor cell 43 gene therapy 43 oligodendrocytes 42 livers 42 genetically identical 42 mesenchymal stem cells 42 zebra fish