Thalidomide tested harmless in murine models but was a famously potent teratogen when tested in pregnant humans. 1 1 https://embryo.asu.edu/pages/studies-thali

Thalidomide tested harmless in murine models but was a famously potent teratogen when tested in pregnant humans. 1 1 https://embryo.asu.edu/pages/studies-thalidomides-effects-rodent-embryos-1962-2008 https://embryo.asu.edu/pages/studies-thalidomides-effects-ro...