Category B. It is considered a category b, which means no risk or adverse fetal effects have been shown but no controlled human first trimester studies are available to confirm. There does not appear to be a risk in the second or third trimester.
Agree with Dr Martin. Although category b as mentioned, current standard of care is Insulin to achieve tighter control during pregnancy. Arguments are made to treat pregnant diabetics with oral agents but most obs & mfm specialists prefer Insulin to help avoid the many complications of diabetes in pregnancy. Discuss options with your OB & make sure your blood sugar is <100-105 fasting & <140 one hour after meals.