妊婦の活性型ビタミンD【25(OH)D】が37.5 nmol/L以上だと体重、頭囲、ポンデラル指標が大きかった。
Vitamin D Levels In Early Pregnancy Associated With Low Birth Weight.
Medscape (12/14, Brown) reported, "Vitamin D levels in early pregnancy are closely related to birth weight, head circumference and ponderal index, but not placental growth, in term infants," according to a study published online Nov. 16 and in the Jan. 2013 issue of the Journal of Clinical Endocrinology & Metabolism. "In a bivariate analysis, women who had 25(OH)D levels of 37.5 nmol/L or more had babies with higher birth weight, head circumference, and ponderal index when compared with those whose 25(OH) levels were less than 37.5 nmol/L, but there were no differences in placental weight and placental-to-fetal weight ratio." Notably, "the differences in birth weight and head circumference by vitamin D deficiency remained after adjustment for trimester at maternal blood draw, maternal race/ethnicity, prepregnancy body mass index, height, smoking, season, and study site."
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