Yeh , pre-diabetic lady can conceive.. But monitor sugars....  Preconception goals : FBS 70 to 100,  2 hour PPBS less than 140 Goals in pregnancy : FBS : 70 to 93,  1 hour post meal all 3 times should be less than 140 Be on Diabetic diet - eat lots of vegetables Daily walking 30 to 45 minutes And check your retina - eye test, TSH also You may have to start folic acid Consult your gynecologist and Diabetologist or endocrinologist