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Biology of Reproduction, Vol 11, 97-101, Copyright © 1974 by Society for the Study of Reproduction
1 Departments of Anatomy/Cytology and Biochemistry, Dartmouth Medical School,
Hanover, New Hampshire The intravenous injection of copper salts into pregnant hamsters on the eighth day
of gestation caused an increase in embryonic resorptions as well as the appearance of
developmental malformations in surviving offspring. Malformations of the heart appeared
to be a specific result of the toxicity of these copper compounds. Copper in a chelated
form (copper citrate) was only slightly more embryocidal, but considerably more embryopathic than that in the uncomplexed form (copper sulfate). Additional studies on the
permeability of the early hamster placenta during the critical stages of organogenesis
(Day 8) revealed that the placenta was permeable to radioactive copper (citrate form),
indicating that this metal may have a direct teratogenic effect upon the developing embryo.
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