Related by context. Frequent words. (Click for all words.) 74 frozen embryos 72 embryos 66 human embryos 65 fertilized eggs 63 fertility clinics 62 embryo 58 cloned embryos 57 therapeutic cloning 54 fertilized egg 54 oocytes 54 infertile couples 53 vitro fertilization 52 stem cells 52 ovarian tissue 52 umbilical cords 52 embryonic stem cell 52 somatic cell nuclear 51 embryonic stem cells 51 embryonic cells 50 fertility treatments 50 stem cell 49 fertility clinic 49 adult stem cells 49 vitro fertilization IVF 48 reproductive cloning 48 IVF 48 PGD 48 aborted fetuses 48 umbilical cord blood 48 wombs 47 ovary 47 cord blood 46 human cloning 46 sperm 45 Stem cell 45 stem cell research 45 ova 45 assisted reproduction 45 stem cells derived 45 fetuses 45 surrogate mothers 44 sperm donors 44 ovaries 44 terminate pregnancy 44 human embryonic stem 43 infertile 43 HFEA 43 adult stem cell 43 islet cells 42 donor organs 42 surrogacy 42 stem cell therapies 42 eggs 41 unborn babies 41 assisted reproductive 41 tissue samples 41 artificial insemination 41 Roe v. Wade 41 Stem Cell Research 41 Human Fertilisation 41 fetus 40 amniotic fluid 40 Reproductive Medicine 40 cloning 40 fallopian tubes 40 Embryonic stem cells 39 childless couples 39 uterus 39 neural stem cells 39 contraceptives 39 Stem cells 39 amniocentesis 39 fertilized 39 Infertility 39 morally wrong 39 informed consent 38 insulin producing 38 heterosexual couples 38 Abortion 38 ES cells 38 pluripotent 38 abortions 38 iPS cells 38 Stem Cell 38 cremated remains 38 cadavers 38 tissue 38 Bioethics 38 ethically 38 Fertility 38 organs 37 infertility 37 unborn 37 procreation 37 abortion 37 genetically identical 37 livers 37 stem cell transplants 37 Human Reproduction 37 babies 37 follicles