Will prediabetes prior to pregnancy lead to development of gestational diabetes during pregnancy for sure? if so, is it harder to revert afterwards?

High risk: Pregnancy does increase resistance to insulin, so if prediabetes beforehand, high risk of developing diabetes during pregnancy. Those with gestational diabetes history also have higher risk for developing type 2 diabetes after pregnancy. Please consider discussing this with both an OB and endocrinologist before getting pregnant to make sure you're in best condition for pregnancy.

Not necessarily: Gestational diabetes is the result of excessive sugar and carbohydrate intake which causes high blood sugar levels, which then make your Insulin levels rise. Plus the hormone changes in preg make prob worse. . Over time the chronically high Insulin levels lead to Insulin resistance and you will need to make higher and higher levels of insulin. You must improve your diet or you will end up with dm.