When pregnant rats given disulfiram, a copper-chelating agent, orally at a dose of 100 mg per day from Day 3 of pregnancy were killed on Day 12 or 13, 83% of the conceptuses showed fetal resorption. In any rat, fetal resorption was uniform among all the conceptuses. The similarity of our results with those found by others for rats fed on a copper-deficient diet suggests that disulfiram renders copper unavailable for the developing embryo.
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