Related by context. Frequent words. (Click for all words.) 67 SCNT 66 human reproductive cloning 65 Therapeutic cloning 64 reproductive cloning 63 cloned embryos 62 cloning 62 Cloning 61 somatic cell nuclear 60 therapeutic cloning 60 cloned embryo 60 human cloning 59 transgenic animals 59 Artificial insemination 58 embryo cloning 58 human embryos 57 cloned stem cells 57 Embryonic stem cell 56 embryo 55 destroying embryos 55 chimeras 54 Embryos 54 embryonic cells 54 unused embryos 54 Embryology Act 54 embryonic stem cells 54 embryos 53 fetal tissue 53 ethically acceptable 53 Human Cloning 53 fertilized embryos 53 leftover embryos 53 xenotransplantation 53 Embryonic Stem Cells 52 somatic cell 52 fetal stem cells 52 umbilical cord stem cells 52 ruminant animals 52 preimplantation genetic diagnosis 52 IVF embryos 52 naturally occurring substances 52 pluripotent stem cell 52 hESC 51 cloned 51 extract stem cells 51 embryonic stem cell 51 genetically modified 51 Cloned 51 iPSCs 51 somatic cells 51 Aminopterin 51 ESCs 51 Embryo 51 unfertilized human 51 pluripotent cells 50 chorionic villus sampling 50 teratomas 50 pluripotent stem cells 50 stem cell research 50 extracting stem cells 50 iPS 50 gametes 50 induced pluripotent stem iPS 50 genetic alteration 50 genetically engineered 50 cloned cattle 50 vitro fertilization clinics 50 unfertilized egg 50 stem cells 49 Genetically modified 49 nonhuman primates 49 ES cells 49 oocytes 49 adult stem cells 49 hunts whales 49 Hwang Woo Suk 49 Adult stem cells 49 gene splicing 49 pre implantation genetic 49 transgenic animal 48 Embryology Authority 48 stem cell therapies 48 genetic manipulation 48 transgenic 48 stem cells derived 48 stem cell colonies 48 Genetically modified crops 48 else e.returnValue = 48 optical biosensors 48 stem cell 48 Blood transfusions 48 genetic modification 48 follicle stimulating hormone 48 Embryology Authority HFEA 48 genetically altered 48 Embryonic Stem Cell 48 Partial birth 47 parthenogenesis 47 Woo Suk Hwang 47 morally justifiable 47 gravely immoral 47 assisted reproduction