Are you at risk of being diagnosed with gestational diabetes? It depends on where you live

Gestational diabetes is diagnosed when women have elevated levels of sugar in their blood during pregnancy. But there's no international threshold. freestocks.org

Sarah lives in London. She is pregnant with her first child. Her mother had gestational diabetes and Sarah is told this puts her into a higher risk category for the condition, thus she should have a test.

At 26 weeks, she has a 75g fasting glucose test to see if she has gestational diabetes. The test requires fasting, drinking the equivalent of two cans of soft drink, and takes several hours.