Characteristics of midluteal phase uterine artery hemodynamics in patients with recurrent pregnancy loss

Aim To study the association in resistance to uterine artery blood flow and recurrent pregnancy loss (RPL) and find its potential influencing factors. Methods A retrospective study was conducted in 870 RPL and 237 non‐RPL patients visiting to the Clinic from January 2014 to February 2018. All participants underwent comprehensive examinations and were scanned by transvaginal Doppler ultrasonography during the midluteal phase to measure the pulsatility index (PI), resistance index (RI) and systolic/diastolic ratio (S/D) values of the left and right main uterine arteries. P value less than 0.05 was considered statistically significant. Results The mean PI, RI and S/D values for uterine arteries were significantly higher in RPL patients than in non‐RPL patients (P