[header] How to know if you have diabetes [title] Assess your risk for gestational diabetes. [step] Gestational diabetes occurs in women who are pregnant. If you're at higher risk, you may be tested during your first prenatal visit and then again in the second trimester. 
Women at low risk will be tested in the second trimester, between weeks 24 and 28. Women who experience gestational diabetes have a higher risk of developing type 2 diabetes within ten years after the birth of their child.