Thankfully the ultrasound isn't invasive at all. The technician this morning was great too. I am SO grateful we didn't have to get a VCUG. They have to strap the babies down for that one. :( I guess 50% of newborn/premie UTIs are due to valve malfunction (or aren't fully developed yet). Since the first ultrasound showed everything was fine I knew this would be fine too. But.... we had to be sure.