Grobman WA, et al. - Researchers planned this study to ascertain the relationships between self-reported psychosocial stress and preterm birth, hypertensive disease of pregnancy, and small-for-gestational-age (SGA) birth. They also investigated the extent to which these relationships account for racial and ethnic disparities in these adverse outcomes. They noticed that non-Hispanic black women most frequently experienced preterm birth, hypertensive disease of pregnancy, and SGA birth among a large and geographically diverse cohort of nulliparous women with singleton gestations. By adjustment for demographic differences, these disparities were not materially altered for preterm birth or SGA birth. In addition, differences in self-reported psychosocial factors did not appear to explain these disparities.