What week are you tested for gestational diabetes?

Can you answer Ashby’s question about Diabetes?:

I’ll be 23 weeks on Monday and I have an appointment with my OB then. I thought she said I’d have to do the glucose test at that time, but she may have meant later. I wondered when you’re typically tested for gestational diabetes in pregnancy?

Also, I’ve noticed I am so thirsty lately. I know this can be a sign of diabetes. But I wondered if dry mouth/thirst is also just a symptom that some pregnant women deal with (who DON’T have diabetes)?

Thanks!

Natural Cure For Diabetes