Yes, it can. A physician should be informed if you had breakfast before a fasting test. 110-120 one hour post-meal is what is followed by some of the more "tight control" oriented practitioners. If the level is higher, watch your carbohydrate intake, especially in the morning, but you should not have blood sugars this low during the day. A fasting reading of 80-90 is good; under 120 two hours post-meal is acceptable by some standards. Testing for ketones is also important if you truly have gestational diabetes. Revisit this with your health care team and ask them what their blood sugar criteria is.