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. 2021 May 17;6:25. doi: 10.1038/s41536-021-00135-1

Fig. 4. Comparative gestational periods of candidate hosts for human–animal interspecies chimera development.

Fig. 4

Mouse (18.5 days), pig (114 days), sheep (152 days), nonhuman primate (NHP) rhesus monkey (166 days), NHP chimpanzee (243 days), human (280), cow (283 days)128.