According to a trial in PLOS Medicine, pregnant women that follow a Mediterranean diet gain less gestational weight and have lower risk of gestational diabetes. The study included 1252 pregnant women with metabolic risk factors (obesity, chronic hypertension, or hypertriglyceridemia) which were randomly assigned to a Mediterranean-style diet (supplemented with mixed nuts and olive oil) or to usual care. Despite the fact of Mediterranean diet result in fewer adverse maternal and offspring complications, the intervention group had a 35% apparent reduction in the odds of gestational diabetes, and participants gained an average 2.75 pounds less compared with the control group.