Transvaginal Doppler sonography for evaluation of irregular uterine bleeding with DMPA
Transvaginal Doppler sonography quantified uterine and subendometrial microvasculature in DMPA users, finding increased perfusion in those with irregular bleeding compared to amenorrheic users.
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This case-control study evaluated 40 depot medroxyprogesterone acetate (DMPA) users, comparing 20 women with irregular uterine bleeding to 20 amenorrheic users, using transvaginal Doppler measurements of uterine and subendometrial microvasculature. The authors quantified pulsatility index (PI) and resistance index (RI) in uterine artery and subendometrial blood vessels and used power Doppler energy to measure subendometrial signal percentage. They found a significant reduction of PI and RI in the uterine artery and subendometrial microvasculature in the irregular bleeding group, with their conclusion describing increased perfusion in those cases. A key limitation stated is the observational case-control design that cannot establish the pathophysiological mechanism of bleeding changes. This paper does not directly discuss endometriosis or adenomyosis; it was included in the corpus via a keyword match in the upstream search index.
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