Related by context. Frequent words. (Click for all words.) 71 embryos 70 frozen embryos 69 human embryos 64 embryo 62 fertilized eggs 58 fertility clinics 58 cloned embryos 58 embryonic stem cells 57 therapeutic cloning 57 embryonic cells 56 somatic cell nuclear 56 embryonic stem cell 54 vitro fertilization 54 reproductive cloning 54 fertility treatments 54 infertile couples 54 stem cells 54 umbilical cords 54 fertilized egg 52 oocytes 51 stem cells derived 51 vitro fertilization IVF 51 adult stem cells 51 stem cell 51 fertility clinic 50 stem cell research 50 human cloning 50 umbilical cord blood 50 human embryonic stem 49 IVF 48 ovarian tissue 47 aborted fetuses 46 Stem cell 45 fetuses 45 cord blood 45 PGD 45 sperm donors 45 sperm 45 adult stem cell 45 cloning 45 HFEA 45 bone marrow stem cells 44 Stem Cell Research 44 infertile 44 stem cell therapies 44 unborn 43 ova 43 ethicists 43 assisted reproduction 43 Human Fertilisation 43 assisted reproductive 43 Embryonic stem cells 43 ovaries removed 43 surrogate mothers 42 fetus 42 iPS cells 42 embryonic 42 Stem cells 42 wombs 42 ovary 41 heterosexual couples 41 neural stem cells 41 babies 41 ovaries 41 amniotic fluid 41 induced pluripotent stem cells 40 infertility 40 ES cells 40 Embryology 40 abortion 40 sperm donor 40 artificial insemination 40 stem cell transplants 40 unborn child 40 islet cells 40 bone marrow transplants 39 terminate pregnancy 39 eggs 39 pluripotent 39 Roe v. Wade 39 Bioethics 39 Stem Cells 39 unborn babies 39 partial birth 39 amniocentesis 39 taxpayer dollars 39 donor organs 39 genetically identical 39 surrogacy 39 cloned animals 38 tissue 38 homosexual couples 38 morally wrong 38 ethical dilemma 38 insulin producing 38 uterus 38 comparative effectiveness 38 genetic defects 38 morally acceptable 38 fallopian tubes 38 lesbian couples