AGE IS 28 , HEIGHT 158,WEIGHT 52 KG. I HAVE DONE MY 3 SCREEN TEST . AND ITS POSITIVE , THE CALCULATED RISK FOR SPINA BIFIDA IS = 1:50 , ANENCEPHALY HAS BEEN EXCLUDED BY ULTRA SOUND , AFP IS 120.00 , HCG IS 39800 AND ESTIROL IS .78 . THIS IS ALL LAB. REPORT NOW WHAT SHOULD I DO