Related by context. Frequent words. (Click for all words.) 73 unfertilized egg 62 pluripotent cells 62 oocyte 60 cloned embryo 59 spermatozoa 59 embryo 59 germ cells 59 somatic cell 58 ovary 58 undifferentiated cells 58 pistil 57 oocytes 57 gametes 57 centrosomes 57 somatic cells 57 organelle 56 unfertilized eggs 56 unfertilized human 56 oviduct 56 zygote 56 fibroblast cells 55 gamete 55 diploid 55 ovum 55 fertilized egg 55 mouse embryos 55 sperms 55 blastocyst 55 cloned stem cells 54 transplanted tissue 54 fertilized eggs 54 genetically identical 54 protein fragment 53 chloroplasts 53 mouse embryo 53 PrP 53 mesenchymal cells 53 stromal cells 53 uterine lining 53 RNA molecule 53 synthetic genome 52 stem cells 52 imprinted genes 52 asexual reproduction 52 extract stem cells 52 ectopic 52 blastocyst stage 52 blastocysts 52 myoblasts 52 epididymis 52 tubules 52 cryopreserved 52 Langerhans cells 51 pancreatic cells 51 Fallopian tubes 51 IVF embryos 51 ribozyme 51 female reproductive organs 51 chloroplast 51 chromosomes 51 Neu5Gc 51 endosperm 51 cloned embryos 51 cultured cells 51 genetic alteration 51 centrosome 50 exosomes 50 retinal cells 50 transplanted stem cells 50 amniotic sac 50 ovarian tissue 50 embryos 50 prion protein 50 iPSCs 50 ovaries 50 amyloid fibrils 50 transgene 50 neural tissue 50 aqueous solution 49 electrochemical reaction 49 rhesus 49 granulocytes 49 ovulated 49 DNA strands 49 metastatic tumor 49 nematode worms 49 viral vector 49 vesicle 49 iPS cell 49 keratinocytes 49 islet cells 49 reproductive organs 49 iPS cells 49 mycelium 49 organism 49 testes 49 retinoic acid 49 mouthparts 49 gonad 49 induced pluripotent stem iPS 49 fertilized embryos