Question from Tuscaloosa, Alabama, USA:

I am 32 years old, 29 weeks pregnant with my second child. At 24 weeks I “failed” the glucose screening test (162 mg/dl [9 mmol/L]) while I was acutely stressed, so I did a three-hour GTT, and unfortunately, I vomited 40 minutes after drinking the glucose solution. My obstetrician decided that, since I have had a lot of problem with nausea/vomiting during this pregnancy, we would just check fasting levels at all my appointments. However, I decided to obtain a blood glucose monitor and began testing my blood sugar several times a day. I also began walking daily, but I did not change my diet (I still ate deserts and did not restrict carbohydrates in any way). My fasting levels over a four week period were 82-93 mg/dl [4.6-5.2 mmol/L], the one hour after meal values were all under 140 mg/dl [7.8 mmol/L] (usually in the 110-120 mg/dl [6.1-6.7 mmol/L]), and the levels two hours after meals were all under 120 mg/dl [6.7 mmol/L]. However, at my 28 week appointment (and at home before the appointment), my fasting level was 99 mg/dl [5.5 mmol/L]. I came down with a respiratory virus that afternoon, and I think that this was why my level was higher than it had been. My obstetrician thinks that I have gestational diabetes or am at least borderline, but I’m not sure that I agree. Do you think these numbers are indicative of gestational diabetes?