Objective: The aim of this study was to assess the value of uterine artery pulsatility index (UA-PI) measured in women with threatened preterm labor, in prediction of preterm delivery. Methods: The current study was conducted at Obstetrics and Gynecology Department, Zagazig University Hospital, Zagazig, Egypt, during period between June 2018 and August 2019. The study included singleton pregnant women who present to the casualty at gestations between 28 and 34 weeks of gestation with symptoms and signs of threatened preterm labor. On admission, during obstetric ultrasound scanning, bilateral uterine artery Doppler ultrasound velocimetry was performed using the transabdominal technique. Uterine artery Doppler scans were both conducted at the peak of uterine contraction and in between contractions when the uterus is fully relaxed. Results: A total 283 women presenting with threatened preterm labor were included in the study. The mean gestational age at presentation was 30.86 ± 1.71 weeks (range: 28 – 33.86 weeks). Of the included 283, 91 (32.2%) delivered within 7 days, while 192 (67.8%) delivered after 7 days of presentation. The mean uterine artery pulsatility index (UA-PI) measured both basally and at the peak contraction were significantly higher among women who delivered within 7 days. ROC curves showed that both basal and contraction UA-PI were significant predictors of delivery within 7 days. There was a significant negative correlation between contraction UA-PI and birth weight. Conclusion: Uterine artery Doppler ultrasound velocimetry measured in women with threatened preterm labor, seems to be a significant predictor of actual preterm labor within 7 days of admission.