will test you for this.

It is thought that women with familial history will express gestational diabetes...but not all do.

Also it tends to be age driven...and you are under 30.

I have strong family history of diabetes and I did NOT have
gestational diabetes. (at 34).

At this time I don't think you can predict who will have it or not.
I'd not worry at this time. You should be eating healthy anyway.
Lots of complex carbs, fruits and veggies and lean meat, with adequate omega-3 intake (either from the new prenatals) or the
OTC supplement Expecta, or from smart Omega-3 products like Smart Balance spreads, peanut butter and Mayo, and Omega-3 eggs. It is important to get adequate choline (as found in eggs) for the fetus, so get the special Omega-3 eggs when you buy your eggs and you get TWO benefits.

The baby's brain develops from essential fats, and will rob the mother for them. Another good source is Flax oil.

You can read about Expecta here:
http://www.meadjohnson.com/app/iwp/H...1&r=3407594432

Your baby will have less risk of ADHD and the best start for a good IQ with proper attention to Omega-3 intake during your pregnancy. There are restrictions to eating fish for pregnant women, including tuna. By using supplements made safely for pregnancy you will both do better.

There are several prenatals now with Omega-3's in them. Ask your doctor.

Congratulations and Best Wishes.