“…12 A few studies that assessed gestational weight gain and preterm birth in relation to race/ethnicity have reported modest and inconsistent differences between non-Hispanic black and white women. 17,18,21,30,31 In the current analysis, we extended our assessment of gestational weight gain and preterm birth to seven racial/ethnic groups. There were considerable differences in weight gain amounts and the prevalence of preterm birth among racial/ethnic groups; however, differences in the optimal ranges of gestational weight gain for minimal risk of preterm birth were small and do not substantiate tailoring weight gain recommendations to race/ethnicity.…”