Estimated latent class trajectories of maternal glucose levels from the HAPO OGTT during pregnancy. Best fit trajectories included a quadratic term and adjustment for maternal BMI during pregnancy and estimated three latent classes: class A (87.8% [3,652 of 4,160]), class B (9.0% [376 of 4,160]), and class C (3.2% [132 of 4,160]). OR (95% CIs) for IGT, in addition to maternal pregnancy BMI already included in trajectory estimates, included adjustments for all other model 4 covariates.