Dim lights before bedtime to reduce risk of gestational diabetes

Pregnant women should dim the lights in their home and turn off or at least dim their screens (computer monitors and smartphones) a few hours before bedtime to reduce the risk of gestational diabetes mellitus, a new study shows. Women who developed gestational diabetes in the multisite study had greater light exposure in the three hours before sleep onset. They did not differ in their light exposure during daytime or sleep or in their activity levels compared to those who did not develop it.

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