a comparison between maternal and neonatal serum level of vitamin d and its relationship with anthropometric neonatal factors

Background objective: the aims of present study were to compare the vitamin d concentration in pregnant women and the umbilical cord blood while investigating for a relationship between its level and anthropometric neonatal factors (i.e. birth weight, birth length, and head circumference).materials methods: the study was performed as a descriptive cross-sectional study on pregnant women who were admitted to the labor ward for delivery. serum level of 25-hydroxyvitamin d [25(oh) d], was measured and compared in women and the umbilical cord blood. the relationship between 25(oh) d levels and anthropometric neonatal factors including birth weight, birth length and head circumference was evaluated.results: a total of 106 pregnant women (53 iranians and 53 afghan refugees’ women) were evaluated. there was a significant correlation between maternal serum level of 25(oh) d and that of their neonates, both in iranians and afghans considering gestational age as a confounding factor (r=0.62, p < /em>=0.000). maternal and neonatal 25(oh) d levels were significantly higher in iranians than afghans (27.2±11.5 ng/ml vs 21.9±12.7 ng/ml, p < /em>=0.026 and 26.5±11.2 vs 17.3±11.4, p < /em>=0.000) respectively. however, neonatal weight and head circumference (hc), were not different in iranians and afghans except for neonatal height which was higher in afghans (p < /em>=0.015) irrespective of lower amount of neonatal 25(oh) d levels.the mean cord levels of vitamin d in boys and girls did not show a significant difference. there was no significant correlation between 25(oh) d serum level and pregnant women’s level of education, pre-labor rupture of membranes (prom), past medical history (pmh), taking supplements and smoking.conclusion: maternal and neonatal 25(oh) d levels did not influence neonatal anthropometry.