Associations of maternal pre-pregnancy underweight with small-for-gestational-age and spontaneous preterm birth, and optimal gestational weight gain in Japanese women.

摘要

Preterm birth and SGA incidences did not differ significantly between pre-pregnancy normal weight women with weight gain of 0.2?kg/week or more and pre-pregnancy underweight women with weight gain of 0.3?kg/week or more, as compared to women meeting IOM guidelines. These results suggest that IOM guidelines for gestational weight gain may lack external validity in Japanese women.