Related by context. Frequent words. (Click for all words.) 87 embryos 78 human embryos 67 fertilized egg 66 embryonic cells 65 embryonic stem cells 64 embryonic 64 stem cells 63 fertilized eggs 63 frozen embryos 61 IVF 61 therapeutic cloning 60 embryonic stem cell 59 stem cell 59 fetus 59 ovary 58 vitro fertilization 57 adult stem cells 57 human cloning 56 fetuses 56 sperm 56 vitro fertilization IVF 56 cloning 56 ovaries 55 human embryonic stem 53 PGD 53 fertilization 52 fertility clinics 52 womb 52 HFEA 52 uterus 51 fertility treatments 51 adult stem cell 51 unborn babies 51 iPS cells 50 fetal 50 infertile couples 50 stem cell research 50 follicles 50 Embryonic stem cells 50 Cloning 50 fertilized 50 tissue 49 vitro 49 conception 49 umbilical cord blood 49 unborn 49 eggs 49 unborn child 48 egg 48 artificial insemination 48 Human Fertilisation 48 aborted fetuses 48 ovarian 47 chromosomes 47 amniotic fluid 47 Stem cell 46 fertility clinic 46 abortion 46 surrogacy 46 implantation 46 organs 45 insulin producing 45 genetic modification 45 Stem cells 45 reproductive organs 45 infertile 45 Fertility 45 ovulation 45 fertility 45 testes 44 organism 44 bone marrow 44 surrogate mothers 44 cloned 44 placenta 44 unborn baby 44 progenitor cells 44 Stem Cell Research 43 cells 43 Stem Cell 43 cord blood 43 utero 43 abortions 43 sonogram 43 infanticide 43 hair follicles 43 reproductive 43 infertility 43 transgenic 43 wombs 43 tissues 42 stem cell therapies 42 cancerous cells 42 pregnancies 42 organ transplants 42 stem cell therapy 42 chromosomal 42 offspring 42 Abortion 42 transplantation 42 ultrasounds