Fig. 1: Infant vitamin D status (above) and weight at birth (below) categorized by season. Seasons are defined as winter: January through March (n = 14); spring: April through June (n = 14); summer: July through September (n = 12); fall: October through December (n = 10). Differences among groups were tested using ANOVA with Tukey's multiple comparison test. Bars with different letters indicate differences between groups (p < 0.05). (There were significant differences between the summer months and those in winter and spring. There were no significant differences between the fall months and the rest of the year.)