14 th World Congress on Ultrasound in Obstetrics and Gynecology Poster abstracts Results: The mean cervical length was 28 mm (range 11–39 mm). The Bishop score was, T 5 in 101 women and f  5 in the 36 others. Vaginal delivery occurred in 92 women (67.1%), and the vast majority of them (89 women; 96.7%) gave birth within 24 hours of induction. Forty-five women (32.8%) had a caesarean section. The Bishop score was not predictive of the mode of delivery. Women with a cervical length < 27 mm were more likely to deliver vaginally. Using this cut-off value the sensitivity of a successful labour induction was 76% and the specificity was 75.5%. Conclusions: Transvaginal sonographic measurement of cervical length is a good predictor of a successful labour induction at term in nulliparas. P03.07 Premature rupture of membranes before 24 weeks. Role of amniotic fluid volume in maternal and neonatal outcome S. Hern ´ andez Aguado , T. Cobo, M. Palacio, F. Figueras, M. S ´ anchez, O. Coll, V. Cararach Hospital Cl´ ınic, Barcelona, Spain Objective: To determinate the relationship between amniotic fluid level measurements and perinatal outcomes in pregnancies complicated with preterm premature rupture of membranes. Design and Methods: Inclusion criteria: singleton pregnancies, preterm premature rupture of membranes (PPROM) before 24 weeks diagnosed in our Institution from December 2000 to March 2004. Deepest pool of amniotic fluid (DAF) was assessed weekly. If DAF was < 1.0 cm in two evaluations, termination of pregnancy (TOP) or amniopatch was offered. If DAF was > 1.0 cm, expectant management was considered. Perinatal and maternal outcomes were evaluated. The diagnosis of amnionitis was made by strict clinical or pathologic criteria. Results: A total of 45 singleton pregnancies were included: DAF DAF 1–2 (n = 8) DAF > 2 (n = 14) Gestational age PPROM (weeks X (SD)) 18.6 (+/-2.9) w 18.6 (+/-3.1) w 19.5 (+/-3.9) w Prior invasive procedure (n (%)) 10/23 (53.5%) 4/8 (50%) 4/14 (38.6%) Amniopatch (n (%)) 8/23 (34.8%) 0 1/14 (7.1%) TOP (n(%)) 10/23 (43.5%) 1/8 (12.5%) 0 Fetal demise (n(%)) 5/23 (21.7%) 0 1/14 (7.1%) Delivery > 24 weeks (n(%)) 7/23 (30.4%) 5/8 (62.5%) 10/14 (71.4%) Excluding TOP: DAF DAF 1–2 (n = 7) DAF > 2(n = 14) Amnionitis (n(%)) 6/13 (46%) 3/7 (42%) 2/14 (14%) PROM-delivery interval (weeks X (SD)) 3.9 (3.2) 6.8 (5.9) 11.5 (9.3) Gest. age at delivery (weeks X (SD)) 23.9 (3.7) 26.1 (4.1) 31.06 (7.9) Conclusions: Pregnancies complicated with premature rupture of membranes before fetal viability have a high risk of perinatal mortality and maternal and neonatal morbidity. Premature rupture of membranes before 24 weeks management is a dilemma; although pregnancy prolongation occurs in many cases, neonatal outcomes remain poor. However, prolongation of pregnancy seems to be correlated with amniotic fluid volume. P03.08 Premature rupture of membranes before 24 weeks. Role of amniotic fluid level when pregnancy prolongs beyond 24 weeks M. T. Cobo , S. Hern ´ andez, M. Palacio, F. Figueras, M. S ´ anchez, O. Coll, V. Cararach Hospital Cl´ ınic de Barcelona, Spain Objective: To determinate the relationship between amniotic fluid level measurements and perinatal outcome in amniotic in pregnancies complicated with preterm premature rupture of membranes (PPROM). Design and Methods: Inclusion criteria: singleton pregnancies, PPROM before 24 weeks diagnosed in our Institution from December 2000 to March 2004. Delivery beyond 24 weeks. Deepest pool of amniotic fluid (DAF) was assessed weekly. Perinatal and maternal outcomes were evaluated. The diagnosis of amnionitis was made by strict clinical or pathologic criteria. Results: From 45 singleton pregnancies with PPROM before 24 weeks a total of 22 singleton pregnancies prolonged beyond 24 weeks were included: (See Table 1) Conclusions: Amniotic fluid level was a good predictor for perinatal outcome among patients with premature rupture of membranes before fetal viability that were able to carry their pregnancy beyond the 24th week. Gestational age at delivery and the interval between PROM and delivery were correlated with amniotic fluid volume. Table 1 DAF DAF 1–2 (n = 5) DAF > 2 (n = 10) p Gestational age PPROM (weeks X (SD)) 20.56 (2.31) 19.3 (3.04) 19.5 (4.37) NS Prior invasive procedure (n(%)) 4/7 (57.1%) 3/5 (60%) 7/10 (70%) Amniopatch (n(%)) 2/7 (28.6%) 0 0 TOP (n(%)) 1/7 (14.3%) 0 0 Fetal demise (n(%)) 1/7 (14.3%) 0 0 Amnionitis (n(%)) 1/7 (14.3%) 1/5 (20%) 0 PPROM-delivery interval (weeks X (SD)) 6.1 (2.65) 8.9 (4.3) 15.3 (8.2) 0.019 Gest. age at delivery (weeks X (SD)) 26.7 (2.7) 28.2 (1.8) 34.84 (5.6) 0.002 Pulmonary hypoplasia (n(%)) 1/7 (14.3%) 1/5 (20%) 0 Skeletal deformities (n(%)) 0 0 1/10 (10%) Neonatal death 2/7 (28.6%) 1/5 (20%) 0 P03.09 Perinatal outcome in preterm premature rupture of membranes with olighohydramnios S. Borna 1 , H. Borna 2 , T. Shakoi 2 1 Tehran University, Iran, 2 Iran Objective: Our purpose was to determine whether AFI < 5 cm after Preterm premature rupture of the membranes (PPROM) is associated with an increased risk of perinatal morbidity. Material and methods: We performed a prospective cohort study of 95 singleton pregnancies complicated by preterm Premature rupture of the membranes (PPROM) with delivery between 26 and 34 weeks’ gestation. Patients were categorized in two groups on the basis of amniotic fluid index < 5, (AFI < 5 cm) (n = 26) or AFI ≥ 5 cm (n = 69). Categoric data were tested for significance with the X 2 and Fisher exact tests. Continuous data were evaluated for normal distribution and tested for significance with the student t test. All 2-sided p values < .05 were considered significant. Results: Both groups were similar with respect to selected demographics, gestational age at rupture of the membranes, gestational age at delivery, birth weight. Both groups were similar with respect to selected variable, latency until delivery, early onset neonatal sepsis, RDS and neonatal death. Patients with AFI < 5 cm demonstrated greater frequency of C/S delivery for non reassuring fetal tests (23% vs 2.8%) (P = 0.001). Post partum infections were not seen in 2 groups. Conclusions: An AFI < 5 cm after PPROM between 26 and 34 weeks’ gestation is associated with an increased risk of maternal infections and frequency of C/S. 284 Ultrasound in Obstetrics & Gynecology 2004; 24: 269–372