Checking urine?

Hi! Just wondering how often everyone's dr is checking their urine? I'm 23 weeks and haven't had my urine checked since my very first visit at 6 weeks, and it just struck me that this may not be normal! I see ladies posting that drs found a uti, protein or glucose in the urine without having symptoms. Should my dr be checking every visit? Will he once I hit my 3rd tri? I'll be asking at my next appointment, but I'm curious. Thanks!!!