whenever you want! I have my 1st one back home in Oregon next month, I will be 20 weeks. then I will have another here in Texas closer to my due date.

I had mine at 35 weeka

its apparently bad luck to have it before your third trimester

ill be 29 weeks when I have mine

I say anytime after 30 weeks ! or when you hit third trimester (:

I had mine last weekend at 31 weeks