其他摘要：Background: Prediction of adverse perinatal and postnatal outcomes could be possible by using ultrasound Doppler evaluation, however there are some controversies regarding this issue in the literature. The goal of present study was to evaluate predictive value of Doppler indices in single and twin pregnancies during second trimester. Materials and Methods: This prospective study was conducted in Yas Hospital, Tehran, between February 2015 and January 2016. The number of 71 singleton pregnancies and 59 twin pregnancies enrolled in this study. A single expert perinatalogist / sonographer did all Doppler ultrasound exams and followed up cases until the end of pregnancy. To compare Doppler indices and pre-postnatal outcomes between singleton and twin groups, the Student’s t-test, Pearson χ2 test and Fisher’s exact test were used for continue and categorical variables, respectively. Results: Rates of preterm delivery and SGA were significantly higher in twin pregnancies compared with singletons (P
其他关键词：Pregnancy outcome; Twin pregnancy; Ultrasonography Doppler; women
