I'm 15 weeks pregnant and just got my NT scan and double marker tests done. I'm worried about my results and need to know if they're normal. My FBHCG is 193 ngmlis that okay? Also, my biochemical T21 risk is 1:178. Does that mean there's a significant risk? My nuchal translucency is 1.7 mm and NT MoM is 1.09. My report mentions the trisomy 21 risk is negative, as well as the trisomy 1318 screen. Can you help me understand what all this means?