||Uterine artery Doppler flow studies during the 21st and 24th weeks of pregnancy are important in the prediction of preeclampsia and IUGR in pregnant women and also in the prevention thereof. Our study of the Doppler flow indices of the uterine arteries involves 115 patients examined in our clinic, with pregnancies ranging from 21 weeks + 0 days to 23 weeks + 6 days. There were 33 patients from 21 weeks + 0 days to 21 weeks + 6 days (28.70%), 41 from 22 weeks + 0 days to 22 weeks + 6 days (35.65%), and 41 from 23 weeks + 0 days to 23 weeks + 6 days (35.65%). The values of the Doppler indices were: PI 1.05±0.46, 1.01±0.36, 1.08±0.62, and 1.05±0.33 and RI 0.58±0.11, 0.57±0.11, 0.57±0.13, and 0.59±0.09 for the entire group and for the three intervals respectively. There were 10 (8.70%), 14 (12.17%, with 9 cases or 71.43% on the left side), and 91 (79.13%) patients with bilateral, unilateral and absent uterine artery notching, respectively. The Doppler indices for the three aforementioned groups were: 1.67±0.85, 1.15±0.49, and 0.97±0.33 for the PI and 0.70±0.12, 0.60±0.12, and 0.56±0.10 for the RI, respectively. The indices for the arteries with and without notching in all patients, as well as for the uterine arteries with and without notching in patients with unilateral notching, were 1.53±0.76, 0.97±0.32, 1.32±0.57, and 0.98±0.33 for the PI and 0.67±0.13, 0.56±0.10, 0.64±0.14, and 0.57±0.10 for the RI, respectively. The mean uterine artery PI and RI vary from 21 weeks + 0 days-21 weeks + 6 days to 23 weeks + 0 days-23 weeks + 6 days. They decrease from pregnant patients with bilateral uterine artery notching to those without notching. The frequency of bilateral uterine artery notching increases in our study with increasing gestational age. Our results are similar to those in literature.
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