EP12.07: Establishment of mass screening for aneuploidies by serum markers in the governorate of Bizerte, northern Tunisia.

Results During the study period, 1285 patients answered our inclusion criteria, including 15 with twin pregnancy. 872 have had markers in the first trimester, while 412 have had markers of the second trimester. 93 patients had positive markers for trisomy 21 and / or trisomy 18 and 13. We observed a trend of public sector Gynecologists asking markers of the first trimester (483/501), while the private sector had prescriptions shared (386/381). We found a trend of underestimation in the measurements provided by 54. 3% of clinicians attested by a measure less than 0. 6 MOM.