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  • Title: [Contents and distribution of Fe, Cu, Zn, Ni, and Mn in fetuses, amniotic fluid, placenta, and uterus of rats].
    Author: Kirchgessner M, Roth-Maier DA, Schnegg A.
    Journal: Res Exp Med (Berl); 1982; 180(3):247-54. PubMed ID: 7123009.
    Abstract:
    Fetuses, amniotic fluid, placenta, and uterus were taken from five gravid rats shortly prior to delivery, and the contents of Fe, Cu, Zn, Ni, and Mn were analyzed. Fe, Cu, Zn, and Mn exhibited a similar concentration in dry matter (DM) in all tested reproductive organs, whereby Fe-contents were five to ten times higher than Zn-contents and those five to ten times higher than Cu-contents, which amounted to 10-20 ppm. The Mn-contents range about a factor of ten below. Ni-concentration in DM of fetuses, placenta and uterus is below 1 ppm, whereas in contrast to this, Ni-concentration of 14 ppm in DM of amniotic fluid is 34 times higher than in fetuses and placenta. Uterus contained twice as much Ni as fetuses. Concerning the total content of the individual trace elements, Ni reacts also different as compared to Fe, Cu, Zn, and Mn. Its amniotic content exceeds the fetal content by 40%. Total excretion of Fe, Cu, Zn, Mn, and also DM is distributed differently as compared to Ni. Fetuses contain 60%-70% of these trace elements, placenta 15%-25%, uterus 6%-16%, and amniotic fluid only 1%-2%. Ni, however, is excreted mostly via amniotic fluid by about 35% of total excretion and only by about 25% via fetuses. These findings, concerning Ni, are discussed in detail.
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