{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,13]],"date-time":"2026-05-13T04:06:48Z","timestamp":1778645208230,"version":"3.51.4"},"reference-count":19,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2017,10,9]],"date-time":"2017-10-09T00:00:00Z","timestamp":1507507200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J of Ultrasound Medicine"],"published-print":{"date-parts":[[2018,4]]},"abstract":"<jats:sec><jats:title>Objectives<\/jats:title><jats:p>To investigate endometrial blood flow during the menstrual cycle in patients undergoing controlled ovarian hyperstimulation (COH), in vitro fertilization (IVF), and embryo transfer (ET) and prediction of pregnancy outcomes based on these characteristics.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Endometrial blood flow was measured in 35 patients undergoing COH and IVF\u2010ET (nonpregnant [n\u2009=\u200915] and pregnant [n\u2009=\u200920]) by measuring the resistive index (RI) of the uterine radial artery using 2\u2010dimensional Doppler ultrasonography. Measurements were obtained in 4 different phases of the menstrual cycle day: early follicular, midfollicular, preovulatory, and midluteal.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The uterine radial artery RI during the early follicular phase was significantly lower in the pregnant group than in the nonpregnant group (mean\u2009\u00b1\u2009SD, 0.61\u2009\u00b1\u20090.01 versus 0.66\u2009\u00b1\u20090.01; <jats:italic>P<\/jats:italic>\u2009=\u2009.029). There was no significant difference between groups during the midfollicular, preovulatory, and midluteal phases (mean\u2009\u00b1\u2009SD, 0.60\u2009\u00b1\u20090.02 versus 0.60\u2009\u00b1\u20090.01; <jats:italic>P<\/jats:italic>\u2009=\u2009.84; 0.61\u2009\u00b1\u20090.09 versus 0.57\u2009\u00b1\u20090.01; <jats:italic>P<\/jats:italic>\u2009=\u2009.12; 0.54\u2009\u00b1\u20090.01 versus 0.57\u2009\u00b1\u20090.02; <jats:italic>P<\/jats:italic>\u2009=\u2009.32, respectively). There was a significant difference in endometrial blood flow between the pregnant and nonpregnant groups during each phase (<jats:italic>P<\/jats:italic>\u2009=\u2009.016). The difference in the changes of the uterine radial artery RI from the preovulatory to midluteal phase between the pregnant and non pregnant groups was significant (\u22120.002\u2009\u00b1\u20090.03 versus 0.07\u2009\u00b1\u20090.02; <jats:italic>P<\/jats:italic>\u2009=\u2009.038).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Increased endometrial blood flow during the midluteal phase, compared to the preovulatory phase, may correlate with successful COH and IVF\u2010ET. Additionally, sufficient blood flow at initiation of COH may affect COH and IVF\u2010ET results.<\/jats:p><\/jats:sec>","DOI":"10.1002\/jum.14418","type":"journal-article","created":{"date-parts":[[2017,10,9]],"date-time":"2017-10-09T08:32:41Z","timestamp":1507537961000},"page":"851-857","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Serial Evaluation of Endometrial Blood Flow for Prediction of Pregnancy Outcomes in Patients Who Underwent Controlled Ovarian Hyperstimulation and In Vitro Fertilization and Embryo Transfer"],"prefix":"10.1002","volume":"37","author":[{"given":"Hwa Seon","family":"Koo","sequence":"first","affiliation":[{"name":"Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cheil General Hospital and Women's Healthcare Center Dankook University College of Medicine Seoul Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chan Woo","family":"Park","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cheil General Hospital and Women's Healthcare Center Dankook University College of Medicine Seoul Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sun Hwa","family":"Cha","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cheil General Hospital and Women's Healthcare Center Dankook University College of Medicine Seoul Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0258-7584","authenticated-orcid":false,"given":"Kwang Moon","family":"Yang","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Cheil General Hospital and Women's Healthcare Center Dankook University 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