***note to people who might not be familiar with what gestational diabetes is - nobody REALLY knows what the cause is (it really seems to have almost nothing to do with what the mother does or doesn't do) but the following theory is pretty popular:
"The placenta supplies a growing fetus with nutrients and water, as well as produces a variety of hormones to maintain the pregnancy. Some of these hormones (estrogen, cortisol, and human placental lactogen) can have a blocking effect on insulin, which usually begins about 20 to 24 weeks into the pregnancy.
As the placenta grows, more of these hormones are produced, and insulin resistance becomes greater. Normally, the pancreas is able to make additional insulin to overcome insulin resistance, but when the production of insulin is not enough to overcome the effect of the placental hormones, gestational diabetes results."
I guess some women's bodies just have a harder time keeping up with the needed insulin levels at this stage in pregnancy. Anyway, I'm relieved I don't have GD but will still continue to eat healthy (I love my garden cucumbers and yellow squash!).