Related by context. Frequent words. (Click for all words.) 52 stem cells extracted 51 stem cells harvested 47 Sexually active 47 rhesus macaque monkeys 47 eggs fertilized 46 amniotic fluid 46 pregnant 46 zygotes 45 leftover embryos 45 unfertilized eggs 45 Maria Frances Lauterbach 45 unborn fetuses 45 cloning embryos 45 extracted stem cells 45 cloned embryo 44 stem cells derived 44 fertilized eggs 44 stem cells 43 undergoing IVF 43 unused embryos 43 IVF embryos 43 rhesus macaques 43 spontaneous abortions 43 umbilical cords 43 Infertile 42 unfertilized human 42 By Yoon Ja 42 menstrual blood 42 intrauterine insemination 42 babies 42 unfertilized egg 42 ovary transplant 42 embryos 42 PREGNANT 42 endothelial progenitor cells 42 cloned embryos 42 frozen thawed 42 females 42 IVF cycles 42 fetal stem cells 41 maternal antibodies 41 rhesus monkeys 41 cloned stem cells 41 polycystic ovary syndrome PCOS 41 embryonic stem cells 41 destroys embryos 41 extract stem cells 41 human embryos 41 septuplets 41 vitro fertilization clinics 41 Pregnant 41 tube fertilization 41 newborns 41 extracting stem cells 40 rhesus 40 placentas 40 aborted fetuses 40 HIV uninfected 40 hESC lines 40 induced pluripotent stem iPS 40 pre pubescent girls 40 fetus 40 granulocytes 40 fetal abnormalities 40 human parthenogenetic stem 40 pancreatic tissue 40 unborn babies 40 transplanted tissue 40 Fetuses 40 vitro fertilization treatments 39 newborn infants 39 cells hESCs 39 mothers wombs 39 aborted fetus 39 fertilize eggs 39 haploid 39 embryonic stem ES 39 fertilized embryos 39 Octuplets mom 39 polycystic ovaries 39 umbilical cord stem cells 39 mouse embryos 39 mothers 39 pancreases 39 conceiving naturally 39 IVF treatment 39 hormone injections 39 fetuses 39 somatic cell 39 Fertility clinics 39 Darlene Haynes 39 gametes 39 oestradiol 39 Embryology Authority HFEA 39 premature menopause 39 Singer Celine Dion 39 artificial fertilization 39 embryonic stem cell 39 Sydney Garvan 38 ovarian stimulation 38 adult stem cells