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The mineral levels in maternal serum change during pregnancy and may be correlated with those of newborn cord blood. The aim of this study was to evaluate the concentrations of calcium (Ca), magnesium (Mg), zinc (Zn), iron (Fe), and copper (Cu) in maternal blood before and after delivery and in umbilical cord vein and artery serum. The study was carried out in 64 Caucasian pregnant women who delivered in a district hospital in Greater Poland region, aged 28.1 ± 5.4 years, with a mean gestational age of 39.2 ± 1.3 weeks. Blood samples were taken from women 2-8 h before delivery and immediately after childbirth. The umbilical cord artery and vein blood of newborns was obtained immediately after childbirth. The levels of minerals in serum were determined by flame atomic absorption spectrometry. A significant drop in the concentrations of Mg (17.71 ± 1.51 vs 17.07 ± 1.61 μg/ml; p &lt; 0.007), Fe (1.08 ± 0.46 vs 0.82 ± 0.35 μg/ml; p &lt; 0.0004), and Zn (0.63 ± 0.17 vs 0.46 ± 0.16; p &lt; 0.0001) in maternal serum was found after delivery. Moreover, higher levels of Ca, Fe, and Zn and lower levels of Cu were observed in the umbilical vein (Ca: 102.80 ± 7.80 μg/ml; p &lt; 0.0001, Fe: 1.96 ± 0.43 μg/ml; p &lt; 0.0001, Zn: 0.65 ± 0.16 μg/ml; p &lt; 0.0001, Cu: 0.36 ± 0.09 μg/ml; p &lt; 0.0001) and in the umbilical artery cord blood (Ca: 98.07 ± 8.18 μg/ml; p &lt; 0.0001, Fe: 1.63 ± 0.30 μg/ml; p &lt; 0.0001, Zn: 0.65 ± 0.15 μg/ml; p &lt; 0.0001, and Cu: 0.36 ± 0.10 μg/ml; p &lt; 0.0001) compared to the maternal serum (Ca: 85.05 ± 10.76 μg/ml, Fe: 0.82 ± 0.35 μg/ml, Zn: 0.46 ± 0.16 μg/ml, and Cu: 1.90 ± 0.35 μg/ml). Fe levels in the cord artery serum negatively correlated with blood loss during delivery (R = -0.48; p = 0.01), while the Ca concentration in the maternal serum after birth decreased with the age of the women (R = -0.25; p = 0.03). In conclusion, it seems that the process of birth alters the mineral levels in pregnant women's blood. Moreover, it was found that blood loss and the age of the mother are associated with mineral concentrations in the maternal serum and cord artery blood.

Evaluation of Mineral Concentrations in Maternal Serum Before and After Birth and in Newborn Cord Blood Postpartum—Preliminary Study