Women develop gestational diabetes more in summer

"Our findings suggest seasonal variations in the 2-hour glucose concentration and in the proportion of women diagnosed with gestational diabetes with a peak in the summer," said Anastasia Katsarou from Lund University in Sweden. The temperature-induced changes in peripheral blood flow may affect the composition of capillary blood, representing a mixture of arterial and venous blood and thus increase glucose levels during the warmer summer months, Katsarou explained.