The place I went to will do gender scans from 14 weeks, and say with 99% accuracy. I thought that seemed really early to be putting that % on it, but I went at 14w5d and she tole me within 5 seconds what the gender definitely was. It was really clear. I think it all depends on the tech, the machine and of course the baby....one that cooperates helps ! I think if you go to a reputable place, and leave it as long as you can before dh goes, it should be fairly accurate! Gl !