Related by context. Frequent words. (Click for all words.) 66 placental tissue 64 cryopreserved 63 oocytes 61 frozen thawed 60 IVF ICSI 60 immunized mice 59 stem cells harvested 59 oocyte 58 umbilical cord stem cells 58 intracytoplasmic sperm injection 57 somatic cell 56 Embryos 56 Xenopus 56 IVF embryos 56 granulocytes 56 Sertoli cells 56 mononuclear cells 56 unfertilized eggs 56 tumor biopsies 56 mouse embryos 55 neural cells 55 spermatozoa 55 microinjection 55 stem cells extracted 55 blastocysts 55 sperms 55 pancreatic tissue 55 serum samples 55 pancreases 55 hESC lines 55 testicular tissue 54 embryos 54 eggs fertilized 54 hematopoietic stem cells HSCs 54 imprinted genes 54 ovarian stimulation 54 lentiviral 54 haploid 54 gametes 54 unfertilized 54 methylation patterns 54 fertilized embryo 53 zygotes 53 differentially expressed genes 53 somatic cells 53 pituitary glands 53 follicle stimulating hormone 53 sperm 53 diploid 53 hematopoietic cells 53 neural progenitor cells 53 ovarian tissue 53 prepubertal 53 blastocyst stage 52 Umbilical cord blood 52 gamete 52 engrafted 52 iPSC 52 fertilized eggs 52 CD# + [001] 52 germ cells 52 extract stem cells 52 pDCs 52 ovulated 52 ESTs 52 mesenchymal cells 52 immunohistochemical 52 asexually 52 fertilize eggs 52 undifferentiated cells 52 peripheral blood mononuclear 51 rhesus macaque monkeys 51 biospecimen 51 transplanted stem cells 51 biospecimens 51 hES cells 51 reimplanted 51 fibroblast cells 51 vitro 51 zebrafish embryos 51 fluorescently labeled 51 biopsy specimens 51 myoblasts 51 genetically engineered mouse 51 triploid 51 Streptomyces 51 immunostaining 51 vitro fertilization clinics 51 unused embryos 51 transgenic mouse 51 tube fertilization 51 endometrial tissue 50 formalin fixed paraffin embedded 50 endostatin 50 stem cells 50 rhesus macaques 50 IgG antibodies 50 teratoma 50 induced pluripotent stem cell 50 adipose fat 50 blastocyst