72 h exposure to drinking water CYN guideline 1 渭g/L did not affect mES proliferation.
1 渭g/L CYN did not affect mES differentiation.
High algal bloom CYN toxin levels have potential for preimplantation toxicity.
Australian Drinking Water CYN guideline 1 渭g/L likely to be ‘safe’ for early embryos.
Embryonic stem cell assay has broad application to screening environmental toxins.