Related by context. Frequent words. (Click for all words.) 55 embryo 55 embryos 55 fertilized eggs 53 chimeras 53 cloned embryos 51 oocytes 51 SCNT 50 reproductive cloning 49 offspring 49 procreate 48 cloning 48 artificial insemination 48 ovum 48 parthenogenesis 48 reproductive biology 48 transgenic 47 selective breeding 47 Embryo 47 IVF 46 fertilized egg 46 Embryos 46 reproductive 46 stem cells 46 therapeutic cloning 46 fetal tissue 46 genetically altered 46 germ cells 46 genetically engineered 45 fertility treatments 45 human embryos 45 blastocysts 45 ovarian tissue 45 sperms 45 assisted reproduction 45 pluripotent stem cells 45 genetically 45 donor sperm 45 human cloning 45 cloned 45 genetic manipulation 44 oocyte 44 infertile 44 embryonic 44 conceive 44 genetically identical 44 sperm 44 blastocyst 44 somatic cell nuclear 44 vitro fertilization 43 iPS cells 43 babies 43 mouse embryos 43 embryonic stem cells 43 ova 43 embryonic cells 43 eugenics 43 clones 43 iPS 43 ovulate 43 fetuses 43 procreation 43 terminate pregnancy 43 vitro fertilization IVF 42 fertility 42 unborn babies 42 genetic defects 42 infertility 42 vitro 42 breeding 42 embryology 42 wombs 42 Cloning 42 reproductive organs 42 utero 42 ovary 42 infertile couples 42 surrogate mothers 42 assisted reproductive 42 reproduction 42 informed consent 41 genetic 41 fertilization 41 stem cell 41 conception 41 bioethicists 41 hESCs 41 artificially inseminated 41 inbreeding 41 gestation 41 captive breeding 41 genetically modified 41 unborn 41 pregnancy 41 implanting 41 induced pluripotent stem cells 41 frozen embryos 40 cultured cells 40 infanticide 40 conceiving 40 PGD 40 breastmilk