POSSIBLY In this retrospective cohort study from Sweden, when the expected date of delivery was postponed more than 7 days as a result of early (<14 weeks' gestation) or late (>16 weeks) ultrasonographic dating, the risk of a small-for-gestational-age infant increased (odds ratio [OR], 1.
Croteau & Marcoux S and Brisson C, Work activity in pregnancy, preventive measures, and the risk of delivering a small-for-gestational-age infant, American Journal of Public Health, 2006, 96(5):846-855.
Higher maternal body mass index before pregnancy has been associated with a lower risk of having a small-for-gestational-age infant and an increased risk of late fetal death and NTDs (Cnattingius et al.
The analysis was unable to find any subset of women for whom aspirin was ineffective for preventing preeclampsia, including women with preexisting diabetes, renal disease, or chronic hypertension, and women who previously delivered a small-for-gestational-age infant.
Likewise, after controlling for maternal age and race, the odds ratio for delivery of a small-for-gestational-age infant, compared with women with no vasculopathy, was highest in those with proliferative retinopathy and nephropathy (see graph below).