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. Author manuscript; available in PMC: 2016 May 1.
Published in final edited form as: Am J Clin Nutr. 2015 Sep 23;102(5):1081–1087. doi: 10.3945/ajcn.115.115295

Figure 1.

Figure 1

Seasonal variation in maternal serum 25-hydroxyvitamin D status in early and late pregnancy (n=1753). Fourier transformations were used to model the seasonal variation in loge[25(OH)D] for early and late pregnancy.