Figure 3. Gestational Age Differences per interquartile range of cervical DNA methylation of PTGER2 and LINE 1-HS, ELEMENT birth cohort, Mexico City. Model 1: Unadjusted Model 2: Adjusted for maternal age Model 3: Model 2 additionally adjusted for Pap smear inflammation Abbreviations: PTGER2 prostaglandin E receptor 2 (subtype EP2); LINE 1-HS long interspersed nuclear element-1 Homo sapiens-specific. Footnote: n = 69 for PTGER2 models and n = 71 for LINE 1-HS models; error bars indicate 95% confidence intervals.