Related by context. Frequent words. (Click for all words.) 69 ovary 61 ovaries 58 embryos 58 stem cells 56 embryo 55 vitro fertilization IVF 55 sperm 54 neural stem cells 54 umbilical cord blood 53 cloned embryos 53 fertilized eggs 53 stem cell transplant 53 vitro fertilization 52 IVF 51 frozen embryos 51 ovarian 50 umbilical cords 50 islet cells 50 infertile 49 bone marrow transplants 49 tissue 49 adult stem cells 49 stem cells derived 49 cord blood 49 bone marrow transplant 49 breast tissue 48 gene therapy 48 fertility treatments 48 stem cell transplantation 48 stem cell transplants 47 follicles 47 assisted reproduction 47 amniocentesis 47 uterus 47 iPS cells 46 bone marrow 46 embryonic cells 46 bone marrow transplantation 46 stem cell 46 human embryos 46 grafts 46 fertilized egg 45 tissue samples 45 fallopian tubes 45 hysterectomy 45 embryonic stem cells 45 autologous 45 insulin producing 45 transplant 44 amniotic fluid 44 stem cell therapy 44 transplantation 44 tumors 44 HFEA 44 fibroids 44 fertility clinics 43 cervix 43 lung tumors 43 implantation 43 liver 43 infertility 43 livers 43 lymph nodes 43 invasive procedure 43 breast milk 43 organs 43 biopsies 43 PGD 42 Sperm 42 Stem cells 42 ovulation 42 implant 42 fetuses 42 corneas 42 breast tumors 42 vitro 42 antibodies 42 marrow 42 colostrum 42 reproductive organs 42 infertile couples 41 conjoined twins 41 assisted reproductive 41 Embryonic stem cells 41 eggs 41 progenitor cells 41 testes 41 tumor 41 transplanting 41 kidneys 41 spinal fluid 41 fertility 41 thymus 41 lumpectomy 41 laparoscopy 41 wombs 41 skin grafts 41 transfusions 41 umbilical cord 41 prostate gland 41 kidney