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Summary. The intravenous injection of 20 mg/kg of sodium arsenate into pregnant golden hamsters on the 8th day of gestation causes a high incidence of exencephaly in embryos recovered 4 to 5 days later. The effect of arsenic seems to be site-specific and may be related to damage of the embryonic mesenchyme.
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Ferm et al. (1968) studied this question.
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