My D was caught when I was five months pregnant with my second son. My a1c at the time was 6.7. The endo told me it’s obviously not normal but not too high to cause birth defects. In pregnancy, targets were lower than 96 for fasting and between 90 and 126 two hours after a meal.
I’ve had 4 a1cs and I’ve never been under 6.
Just to save some of you the worry, I had D during my pregnancy with my son three years ago. I had midwives and they only relied on urine tests and a few random blood readings. My sugars were very high and they just kept telling me to stop eating carbs. Long story short, I had all the complications – high, high blood pressure, extra aminotic fluid, large baby, and everything was fine in the end. My son is almost three now and he’s perfectly fine and I’m fine. Obviously I wouldn’t recommend letting your D get out of control, but don’t sweat the small stuff when you’re doing everything you can.