Every time they scan me the LO measures farther along. The NT was 1.2 so everything looks good there and our spawnling measured at 46mm with a heart rate of 179. I was rather disappointed that I really couldn't see the screen during the scan. The monitor was at an angle where I could barely make it out and there was a glare from the window on it. Luckily my husband had a great view, so he got to see what our LO was up to the whole time.