<qa>  What is the third hypothesis that women with increased insulin resistance will result in larger birth weights andWe hypothesize that women with lower resting metabolic rates RMR in the first trimester will demonstrate a greater maternal weight gain, when adjusted for caloric intake and activity. It is also hypothesized that for a given RMR, the degree of maternal insulin resistance IR predicts birthweight adjusted for a given caloric intake. A third hypothesis is that women with increased insulin resistance measured by HOMA will result in neonates with larger birth weights and a greater degree of neonatal fat mass as measure by DEXA scan, adjusted for RMR and diet characteristics. 