Gestational diabetes: How to prevent?

For rice, I lessen the portions and ate basmati instead. Stopped taking bread unless it was rye. I ate wholemeal pasta, and couscous. Ice cream maybe once a month or none at all. No sugar in my tea. No sweets, cakes, desserts. No carton juices. Ate fruits that naturally has less sugar in it. I love strawberries actually, but I just ate everything in moderation. If I felt like having something sweet, Id just eat fruits, Dark chocolate sorbet, or just focus my mind on smtg else.