While some women put on too much weight during their pregnancies some women don’t put on enough. This can be a particular problem for women who are having twins. In this study Candice W. Greenan, from the University of South Carolina, led a team of researchers who studied 588 women who had had twins. 59.9% of the women achieved their weight-gain goals and they had fewer premature births, larger babies and were less likely to have twins whose birth weight was below the 10th centile. Babies whose mothers had gained enough weight were also less likely to need a respirator, stayed in hospital for fewer days (if at all) and were less likely to be admitted to a neonatal intensive care unit.
You can read the abstract of this article here.