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© 2003 by the American Institute of Ultrasound in Medicine
J Ultrasound Med 22:27-31 • 0278-4297

Impaired Uterine Arterial Blood Flow in Pregnant Women With Recurrent Pregnancy Loss

Mikiya Nakatsuka, MD, PhD, Toshihiro Habara, MD, PhD, Soichi Noguchi, MD, PhD, Hideki Konishi, MD and Takafumi Kudo, MD, PhD

Department of Obstetrics and Gynecology, Okayama University Medical School, Okayama, Japan.

Address correspondence and reprint requests to Mikiya Nakatsuka, MD, PhD, Department of Obstetrics and Gynecology, Okayama University Medical School, 2-5-1 Shikata, Okayama City, Okayama 700-8558, Japan.

Objective. This study was undertaken to evaluate uterine perfusion, which regulates uterine receptivity, in women with recurrent pregnancy loss. Methods. We evaluated the blood flow resistance in the uterine arteries of 104 pregnant women at 4 to 5 weeks’ gestation by transvaginal pulsed Doppler ultrasonography (control group, n = 52; and recurrent pregnancy loss group, n = 52). Blood tests for antinuclear and antiphospholipid antibodies were also performed. Results. The uterine arterial pulsatility index in the recurrent pregnancy loss group was significantly higher than that in the control group. Women with antinuclear or antiphospholipid antibodies had an elevated pulsatility index in the uterine artery, which is prominent in women with recurrent pregnancy loss. Coagulopathy and vascular dysfunction caused by autoantibodies may impair uterine perfusion. However, the uterine arterial pulsatility index in the recurrent pregnancy loss group was significantly higher than that in the control group even among women without antinuclear antibodies or among women without antiphospholipid antibodies. This observation strongly suggests that the uterine artery pulsatility index may be an independent index for recurrent pregnancy loss. Conclusions. The introduction of pulsed Doppler ultrasonography has provided the means for noninvasive evaluation of uterine impedance and may identify patients with recurrent pregnancy loss associated with impaired uterine perfusion.

Key Words: antinuclear antibodies • antiphospholipid antibodies • pulsed Doppler ultrasonography • recurrent pregnancy loss • uterine artery

Abbreviations: ANA, antinuclear antibody • APA, antiphospholipid antibody • PI, pulsatility index • RPL, recurrent pregnancy loss




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