{'fraction_non_alphanumeric': 0.044151115157032315, 'fraction_numerical': 0.03413746017296313, 'mean_word_length': 4.989100817438692, 'pattern_counts': {'":': 0, '<': 2, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
EP16.03: The value of maternal and fetal Doppler parameters in postdate pregnancies - a prospective study.

Objectives: The study aimed to determine the clinical significance of maternal and fetal Doppler flow indices in postdate pregnant women in the prediction of adverse maternal and fetal outcome. Methods: Pregnant women with low risk pregnancy were recruited during a routine postdate follow-up. All participants underwent Doppler interrogation including middle cerebral, umbilical and uterine arteries. Adverse perinatal outcomes were defined: arterial cord PH<7.1, Apgar score <7 in 5th minute, admission to NICU, and a Caesarean operation preformed due to non-reassuring fetal heart rate monitoring. Results: 120 pregnant women were recruited. Mean maternal age was 31.9 (±4.6) years. Mean gestational age at examination was 40.2 weeks (±0.46), and 41.2 weeks (±0.49) at delivery. 56.7% were nulliparous. 31.7% had meconium stained amniotic fluid in labor. Mean neonatal birthweight was 3535 gr (range 2455–4545 gr). 11 neonates (9.2%) were admitted to the NICU. Negative correlation was found between the umbilical artery Doppler indices SD, RI, PI and neonatal birthweight (P = 0.04, 0.02, 0.01 respectively). Other Doppler indices did not correlate with birthweight. The rate of adverse perinatal outcome was 17.5% (n = 21), 81% occurred in nulliparous. The risk of adverse perinatal outcome was significantly higher in nulliparous (P = 0.01). Doppler indices of UA, MCA and uterine artery did not differ significantly between pregnant women with or without adverse perinatal outcome. A higher risk for adverse perinatal outcome was observed in cases of meconium stained amniotic fluid (P = 0.03). The only Doppler index associated with meconium stain amniotic fluid was the umbilical artery RI (P =0.02). Conclusions: Elevated values of umbilical artery RI in low risk postdate pregnancies are associated with meconium stained fluid during labour, which in turn is associated with adverse perinatal outcome. Collectively, the results of this study suggest that umbilical artery Doppler interrogation of uncomplicated postdate pregnancies may be associated with an unfavorable outcome.