Relationship between endometrial VFI values detected by three-dimensional power Doppler ultrasound and pregnancy outcomes in FET patients and prediction of the optimal VFI range—a retrospective cohort study - Takeaways - MDSpire

Relationship between endometrial VFI values detected by three-dimensional power Doppler ultrasound and pregnancy outcomes in FET patients and prediction of the optimal VFI range—a retrospective cohort study

  • By

  • Run Zhao

  • Linlin Che

  • Xiaofang Li

  • Qianyan Song

  • Lihong Zhou

  • Siyu Long

  • Yu Zhang

  • June 5, 2026

  • 0 min

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  • 1

    This study analyzed the relationship between endometrial vascular flow index (VFI) and pregnancy outcomes in 338 frozen embryo transfer patients.

  • 2

    Higher endometrial VFI values were associated with significantly lower abortion rates in patients undergoing frozen embryo transfer.

  • 3

    The optimal VFI threshold identified for improved pregnancy outcomes was greater than 0.17, indicating better prognosis above this value.

  • 4

    Three-dimensional energy Doppler ultrasound effectively measures endometrial VFI, serving as a predictive indicator for miscarriage risk.

  • 5

    Clinicians can use a VFI of > 0.17 as a reference for evaluating endometrial receptivity during frozen embryo transfer.

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