Hihi, I also only did FTS as I’m not eligible for Down syndrome bloodwork. According to my gynae, from scans usually it is 75-80% accurate. (Bloodwork is 90-99%). So I think that person just happened to fall in that 20-25%. What was your FTS result? Was it high or low risk? If your gynae is concerned I think there are other tests available but can be quite invasive.