Objective To present the normative data of the transverse diameter of the developing fetal thymus. Methods

Objective To assess the effect of imaging angle and fetal presentation on the measurement of nuchal skin fold thickness (NFT)

Objective

Objectives To assess the prevalence, prenatal detection rate, and associated anomalies of congenital curly toe in an unselected obstetric population. Methods

Poster abstracts by conventional 2D ultrasound, it was confirmed by another senior sonographer. 3D color and power Doppler were applied to delineate vascular anatomy of this area subsequently. Confirmation of antenatal diagnosis was made in all newborns. Results: Four fetuses with PRUV were detected in these 1067 cases. The estimate incidence is about 0.375% (1 : 267). Ductus venosus were found in all of the fetuses. All of them had no other additional malformation. Discussion: The diagnosis of persistent right umbilical vein was easily made in a transverse section of the fetal abdomen with ultrasound findings of the portal vein towards to the stomach and fetal gallbladder located medially to the umbilical vein by twodimensional sonography. The incidence of PRUV in our patients was similar to other articles. Reconstruction of portal system in fetus with PRUV by 3-dimensional ultrasound was easy to delineate the vascular anatomy of this area. We proposed this modality can be used to help to understand the vascular anatomy of the fetus with PRUV.

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th World Congress on Ultrasound in Obstetrics and GynecologyPoster abstracts artery was determined. Data are reported as mean ± 1 SD and analysed by paired t test. Results: No statistically significant behavioural-state-related changes were observed for UV time-average velocity and UV volume flow, resulting in UV volume flow per kg fetus of 69.1 ± 14.9 ml/min/kg at 1F and 71.6 ± 12.1 ml/min/kg at 2F (ns). A statistically significant increase (p = 0.02) was established for UV cross-sectional area (46.4 ± 8.6 mm 2 vs 49.0 ± 10.1 mm 2 ) and for FHR from 134.2 ± 10.3 bpm in 1F to 144.2 ± 7 bpm in 2F. Umbilical artery PI was not significantly different between the two behavioural states. Conclusion: It can be concluded that on the basis of high venous vessel wall compliance, the significant increase in UV cross-sectional area during fetal behavioural state 2F may be determined by a rise in mean venous pressure. The significant rise in FHR may reflect elevated fetal cardiac output during this behavioural state. This is further supported in part by a mild increase in UV volume flow. P069The genetic sonogram: experience with isolated ultrasound soft markers in 1463 high-risk pregnancies