Introduction: The objective of the study was to describe food consumption patterns over the trimesters throughout pregnancy in a prospective obstetric cohort. We planned to characterize patterns of overall food and organic food consumption into groups using a latent class analysis (LCA). Methods: A Midwest pregnancy cohort self-reported dietary food intake and percent of foods of each type that they consumed which were organic on a questionnaire. This was administered multiple times during pregnancy. The food frequency questionnaire was designed for this study and contained questions related to 89 food categories. The questionnaire was completed once in each trimester, after they were enrolled into the study. The cohort has responses across the 13 food domains were grouped by a LCA process demonstrating separation of the cohort by higher or lower consumption of fruits, vegetables, and berries and percentage of those foods where organics were consumed. The organic percentage in each food was categorized as low (0-10%) and significant (anything > 10%). Demographic characteristics were compared between LCA groups. Results: Valid responses were analyzed from 359 participants. The LCA best model grouped participants into 3 groups: I- high fruits, vegetables and berries, with significant organic use; II- high fruits, vegetables, and berries, with low or no organic use; and III- low fruits, vegetables, and berries with low organic use . Using this grouping, there were 84 (23.4%) in Class I, 153 (42.6%) in Class II, and 122 (34.0%) in Class III. There were significant differences in racial distribution in the groups, with lower rates of Caucasians in Class II and higher rates of Hispanic women in reporting Class I. We observed that 50% of African American women were grouped into Class III. Women in class III tended to be younger (p=0.01), unmarried (52.4%, p<0.001), have less than college degree attainment (p=0.0005), be of lower income (p<0.001), and be a current smoker (p=0.03). -While not statistically significant, living in an urban area was higher for those in Class III than in Class I or II. - Participants living in rural areas were reported significant organic food consumption 18.6%, compared to 24.1% of those in suburban areas and 23.1% in urban areas (p=0.36). 23.1% of rural-dwelling participants were grouped in Class III compared to 31.9% of those in suburban areas and 35.3% of those in urban areas. (p=0.36). Conclusion: Self-reported food consumption in this pregnancy cohort was categorized in 3 classes based on consumption of fruits, vegetables, and berries and the percentage of foods consumed that were organic. These Classes were associated with multiple maternal characteristics. This may indicate opportunities for dietary education interventions for pregnant individuals.