Mean IGF2 concentration did not vary significantly by maternal age (p = 0.51), marital status (p = 0.82), smoking during pregnancy (p = 0.83), chorioamnionitis (p = 0.87) or indicators of maternal socioeconomic status such as educational attainment (p = 0.32) and type of health insurance coverage (p = 0.22) although five individuals with no insurance had significantly lower IGF2 levels. Here, IGF2 is linked to chorioamnionitis.