Related by context. Frequent words. (Click for all words.) 47 cloned embryos 46 embryo 44 cloning 43 embryos 41 Clonaid 41 somatic cell nuclear 41 IVF 41 therapeutic cloning 40 assisted reproduction 39 assisted reproductive 39 Kamrava 39 vitro fertilization 39 human cloning 39 reproductive cloning 38 HFEA 38 Reproductive Medicine 38 PGD 37 Cloning 37 stem cell 37 blastocysts 37 Advanced Cell 37 embryonic cells 37 Fertility 37 Hagens 37 fertilized eggs 37 embryology 37 adult stem cell 37 artificial insemination 36 fertility clinic 36 cloned 36 vitro fertilization IVF 36 fertility clinics 36 human embryos 36 Hwang Woo suk 36 Embryology Authority 35 bioethicists 35 surrogacy 35 frozen embryos 35 Human Reproduction 35 geneticists 34 fertility treatments 34 infertile couples 34 ultrasound scan 34 blastocyst 34 adult stem cells 34 Dr Nitschke 34 ovarian tissue 34 destroying embryos 34 cryopreservation 34 Gynaecologists 34 sperm donors 34 infertility treatments 34 Schatten 34 Beatie 34 amniocentesis 34 Ramaley 34 stem cells 34 virgin birth 34 sperm 33 fertilized egg 33 regenerative medicine 33 ultrasounds 33 cloned animals 33 oocytes 33 Embryo 33 Embryology 33 Stem Cell 33 artificially inseminated 33 ova 33 surrogate mothers 33 fertility 32 Hwang 32 embryonic stem cell 32 placentas 32 donor sperm 32 parthenogenesis 32 Carhart 32 Embryos 32 bioethics 32 organ harvesting 32 aborted fetuses 32 induced pluripotent stem cells 31 Craig Venter 31 insemination 31 inseminated 31 urologists 31 stem cell research 31 fertilization 31 abortions 31 gynecologist 31 obstetrician 31 embryos implanted 31 SCIENTISTS 31 womb 31 scientists 30 StemCells 30 Nadya Suleman 30 fetuses 30 stem cell therapies 30 genetic modification 30 Embryonic stem cell