USA & UK scans

Hey, I am 7weeks 2days with my 2nd child. I have noticed that you American mumma's have early and regular scans. In the U.K. We only have a 12week & 20week as standard, unless there are more risks. Always wondered why you guys have more? Wondering if it's because you pay for health insurance and ours is free. Curious more than anything ☺️😊