The incidence rate of malformed fetuses was 22.54% in our study group. The ultrasound detection rate was 79.02% (1062/1344). Level III prenatal ultrasound were of great value in decreasing the abortion rate of ≥ 28 gestational weeks malformed fetuses, improving malformations detection rate. The differences of the above rates between before and after level III prenatal ultrasound were of scientific value, P < 0.05. Conclusions: Level III prenatal ultrasound is important in prenatal diagnosis. It is of great help in decreasing the birth rate of malformed fetuses.

Objective: To analyze the methods of prenatal sonographic diagnosis of all kinds of aortic arch anomalies and to improve prenatal sonographic detection rate of aortic arch anomalies. Methods: 73 fetuses with congenital aortic arch anomalies were studied. The results from prenatal ultrasound examination, postnatal examination were compared. Results: 73 cases were with congenital aortic arch anomalies, 33 cases with malposition of aortic arch, 9 cases with normal left aortic arch with aberrant left subclavian artery, 5 cases with interruption of aortic arch, 26 cases with coarctation of aortic arch. The accuracy rate of prenatal sonographic diagnosis was 87.7%. Conclusions: Aortic arch anomalies have typical sonographic image. If we grasp typical sonographic images, we could make accurate diagnosis. P15.11Trends in prenasal thickness, nasal bone length and nuchal fold thickness measurements in second and third trimester Down syndrome fetuses

Oral poster abstractstechnique. It is possible that the potential to depict and display very thin slices of the fetal face, up to 0.2 mm in thickness, allows better differentiation of signals from the lip and signals from the palate in cases of very small lesions of the palate. OP09.05The fetal soft palate: not a nowhere land on 3D ultrasound

Oral poster abstracts Conclusions:The DV PIV is increased in female fetuses with an increased NT compared to normal females at 11-14 weeks. The RV MPI is increased in male fetuses with an increased NT compared to normal males at 18-23 weeks. There appear to be no other gender related differences in diastolic cardiac function in fetuses with a normal or increased NT at 11-14 and 18-23 weeks. OP21.06Sizes of fetal cardiovascular structures across gestation

Poster abstracts Conclusions: 3D multislice ultrasound improve diagnostic capabilities in detection of fetal urinary tract anomalies. It improved discrimination of normal kidney from pathological types and 3D multislice allowed morphological analysis of fetal kidneys in various planes in order to obtain the best section for final diagnosis.