10–14 October 2010, Prague, Czech Republic Poster abstracts the study. The VCI-C method was used. Polynomial regressions with adjustments using the determination coefficient (R2) were used to assess the correlation between vertebral body area and gestational age (GA) and fetal parameters [biparietal diameter (BPD), head circumference (HC), abdominal circumference (AC), femur length (F) and estimated fetal weight (EFW)]. The mean, standard deviation, median, minimum and maximum values were calculated for each gestational age. Results: There was a high correlation between all VBA and GA. The linear regression was the model that best expressed the correlation between these variables: VBA L1 =−168.8106 + 10.0482 *GA, r 2 = 0.8154 for the first lumbar vertebral body. The mean VBA L1 went from 33.55 ± 5.46 cm 2 (28.09–39.02 cm 2 ) to 181.36 ± 5.77 cm 2 (175.59–187.13 cm 2 ). There was a high correlation between all VBA and fetal biometric parameters (BPD, HC, AC, F and EFW), all P < 0.0001. Conclusions: There was a high correlation between GA and biometric parameters. Reference limits were generated for lumbar and sacral (S1 and S2) VBA between 20 and 34 weeks. P10.06 Three-dimensional power Doppler ultrasound for the assessment of the fetal brain vascularization and blood flow in normal pregnancy H. F. Milani, A. Moron, E. Q. Barreto, E. Araujo Junior, K. K. Haratz, L. C. Rolo, L. Nardozza Universidade Federal de S ˜ ao Paulo, S ˜ ao Paulo, Brazil Objectives: To assess the fetal brain vascularization and the blood flow in normal pregnancies using three-dimensional power Doppler (3D power Doppler) vascular indices in the Willis’ circle territory, and to show the correlation between gestational age and these vascular indices. Methods: A cross-sectional study was carried out on 111 normal pregnancies between 26 and 34 weeks to assess fetal brain blood flow by using 3D power Doppler (GE Voluson 730 Expert). The Willis’ circle was scanned and volume was calculated by using the sphere mode of the VOCALTM program. Then the VOCAL SHELL HISTOGRAM switch was activated for the automatic calculation of the 3D power Doppler indices: vascularization index (VI), flow index (FI) and vascularization-flow index (VFI). Scatter graphs, Pearson correlation coefficients and linear regression models were used to evaluate the correlation between gestational age and the 3D power Doppler indices. Results: Only the FI (r = 0.412 and P < 0.001) had correlation with gestational age. The other 3D power Doppler indices VI (r = 0.055 and P = 0.566) and VFI (r = 0.122 and P = 0.201) showed no statistically significant correlation with gestational age. Conclusions: Cerebral vascular circulation can be evaluated by 3D power Doppler, using as region-of-interest the Willis’ circle. It was observed correlation between gestational age and the FI. The other 3D power Doppler indices showed no statistically significant correlation with gestational age. The understanding of the behavior of theses indices throughout normal pregnancies can help to better understand the mechanisms of adaptations in complicated pregnancies as well as basis for future studies that examine the applicability of the 3D power Doppler in the prediction of abnormal fetal growth. P10.07 Ultrasonographic and magnetic resonance imaging (MRI) detection of placenta accreta K. Maeda , M. Suto, M. Sato, T. Kaji, M. Irahara Obstetrics and Gynecology, The University of Tokushima School of Medicine, Tokushima, Japan Objectives: The aim of this study was to determine whether ultrasonogrphy and MRI can be diagnosed placenta accreta. Methods: Fifty two cases complicated with placenta previa were enrolled in this study. Ultrasonography and MRI were performed prospectively in all patients in our hospital. We evaluated the signs of placental accreta (placental lacuna, loss of retroplacental clear zone), protrusion of the placenta into the bladder, etc). Results: Fifty two cases with placenta previa were evaluated to our hospital since 2005. The cases of historogical placenta accreta were 3 cases after labour. The diagnosis of placenta accreta were suspected in 9.6% of 5/52 cases during second or third trimester. The false positive rate was 60% of 3/5 patients. The false negative rate was 0%. By sonography, the sign of loss of retroplacental sono- lucent zone, placental lacuna were 100% of 5/5 cases, 60% of 3/5 cases, respectively. By MRI imaging, the sign of the protrusion of the placenta into the bladder were 60% of 3/5 cases. All signs of sonography and MRI imaging were 100% of 3/3 patients. Conclusions: The use of sonography and MRI imaging were exactly increased detection rate of the prenatal diagnosis of placenta accreta. P10.08 Incidental finding of an abdominal pregnancy at 21 weeks of amenorrhea: from imaging to therapy P. Bouhanna Department of Obstetrics and Gynecology and Reprod, Poissy, France The unicornuate uterus with rudimentary uterine horn, representing 4% (1) of uterine malformations and affect the general population of 1 per 100,000 (2). Pregnancy in rudimentary uterine horn is a rare, about 1 per 140,000 pregnancies (3). Despite advances in ultrasound, it is often diagnosed in the context of uterine rupture complicated with hemorrhagic shock. The second risk is that obstetric abnormalities of placental insertion with a risk of trophoblastic invasion of the pelvic organs surrounding the uterus. We describe a case of rupture of rudimentary uterine horn not communicating discovered incidentally on ultrasound of 21SA. The asymptomatic nature has to make a diagnosis and prognosis accurate through the use of various imaging means at our disposal (ultrasound, CT and MRI), and that appropriate care. We explain in this observation, the path diagnosis implementation using imagery that has helped clarify the diagnosis and prognosis of pregnancy before surgery. Supporting information can be found in the online version of this abstract. P10.09 Oligohydroamnios – according to the cord D. Bashiri 1,2 , J. Mashiach Friedler 1,2 , M. Mazor 1,2 1 OBGYN, Soroka University Medical Center, Beer- Sheva, Israel; 2 Ben-Gurion University of the Negev, Beer-Sheva, Israel A 33-year-old nulipara at 22 weeks gestational age was admitted to the emergency room due to a back trauma. There was no direct trauma to the abdomen. She had full prenatal care that included nuchal translucency, early anatomy scan, triple test, and late anatomy scan; all were normal. She was hospitalized for observation. Physical examination was normal. In ultrasound (US) examination biometry was in the normal range with oligohydramnios with AFI 3.7 cm. In repeated ultrasound AFI was 8 cm. The patient was discharged for ambulatory follow up. At 26+6 weeks, IUGR was suspected and several examinations were undertaken including TORTCH evaluation as well as connective tissue diseases; they were all negative. Doppler studies of the uterine artery and the umbilical artery were normal. AFI was measured at 4 cm. The patient declined amniocentesis. In addition, GDM was diagnosed Ultrasound in Obstetrics & Gynecology 2010; 36 (Suppl. 1): 168–305 207