Exercise Might Not Prevent Pregnancy-Related Diabetes

Of course not. Gestational diabetes is more commonly seen in fatsos.

Pregnant women who exercised regularly during the second half of their pregnancies did not lower their odds of gestational diabetes in a recent trial.

Researchers in Norway found that when they randomly assigned 855 pregnant women to either exercise three times a week or to stick with regular prenatal care alone, the exercisers were no less likely to develop gestational diabetes.

By the third trimester, 7% of the exercise group and 6% of the control group had been diagnosed with gestational diabetes.

Unless you are a member of the idle class, exercise is an idiot's game for controlling weight. (see here and here)