You could have a larger than usual baby. I mean larger by size and of course, by weight. Don't be fooled by idea that a larger baby means a healthier baby. The baby MAY have mental problems such as mental retardation. A bigger baby can also cause complications when giving birth because they might become too big to pass through the birth canal, there's also increased risk of fetal distress during labor which is bad for the baby. There are medications that can be prescribed for diabetes in pregnant women. Consult your ob-gyne about your condition.