A new study claims that pregnant women should dim lights in their home and turn off or at least dim their computer or smartphone screens a few hours before bedtime could help to reduce the risk of gestational diabetes mellitus.

Gestational diabetes is a common pregnancy complication and is known to increase obstetric complications, and the mother's risk of diabetes, heart disease and dementia. The baby also is more likely to have obesity and hypertension as they grow up.

The study, published in the American Journal of Obstetrics and Gynecology Maternal Fetal Medicine, examined 741 women in their second trimester.