Related by context. Frequent words. (Click for all words.) 63 spermatozoa 62 oocyte 62 germ cells 59 oocytes 58 germline 58 embryo 57 mouse embryos 57 blastocyst 56 reproductive tract 56 neural stem cell 56 fibroblast 55 somatic cells 55 pluripotent cells 55 myoblasts 55 RPE cells 55 organelle 55 reproductive hormones 54 cultured cells 54 somatic cell 54 neuronal cells 54 HSCs 54 ovary 54 lysozyme 54 progenitor cell 54 unfertilized egg 54 PrP 54 cryopreserved 53 collagen fibers 53 fibroblasts 53 meiosis 53 cardiomyocytes 53 chondrocytes 52 endometrium 52 thymus 52 keratinocytes 52 zygote 52 testis 52 dentate gyrus 52 follicles 52 SOD1 52 mucin 52 stem cells 52 osteocalcin 52 gametes 52 ectopic 52 viral vector 52 hepatocytes 52 neural tube 51 prion protein 51 astrocyte 51 oligodendrocytes 51 embryogenesis 51 blastocysts 51 epithelial cell 51 sperm 51 retinal cells 51 embryos 51 mammalian cells 51 ES cells 51 recombinant protein 51 mammary gland 51 ovaries 51 transgenic mice 51 ovum 51 vitro 51 iPSCs 51 mesenchymal stem cells 51 transgene 51 unfertilized eggs 51 photoreceptor 50 cytoplasmic 50 testes 50 sperms 50 iPS cell 50 enzymatic activity 50 cloned embryo 50 vesicle 50 plasmid DNA 50 tissue 50 follicle 50 Aβ 50 mutant protein 50 neural stem cells 50 multicellular organisms 50 transgenic plants 50 stromal cells 50 chloroplast 50 epithelial cells 50 genital tract 50 atherosclerotic plaques 50 polypeptide 50 bioactivity 50 aneuploidy 49 tubules 49 neurogenesis 49 zebra fish 49 epithelium 49 progenitor cells 49 diploid 49 stromal 49 cAMP