{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,8]],"date-time":"2026-09-08T14:35:29Z","timestamp":1788878129776,"version":"build-2803163510"},"reference-count":25,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2020,4,12]],"date-time":"2020-04-12T00:00:00Z","timestamp":1586649600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"Shanghai municipal medical and health discipline construction projects","award":["2017ZZ02015"],"award-info":[{"award-number":["2017ZZ02015"]}]}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J of Obstet and Gynaecol"],"published-print":{"date-parts":[[2020,6]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Aim<\/jats:title><jats:p>The incidence of placenta previa before the third trimester is high. But many cases resolve as pregnancy progresses. Our study was to evaluate the efficacy of uterine artery Doppler velocimetry at mid\u2010term gestation for predicting placenta previa resolution in third trimester.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>A single\u2010center retrospective study was done. A study cohort of 504 subjects with placenta\u2010cervix os distance measured both at 22\u201324\u2009weeks and after 36\u2009weeks of gestation and uterine artery Doppler velocimetry measured at 22\u201324\u2009weeks of gestation were selected. The subjects were assigned to control group (<jats:italic>n<\/jats:italic> = 351), resolving group (<jats:italic>n<\/jats:italic> = 89) and placenta previa group (<jats:italic>n<\/jats:italic> = 64) according to their diagnosis of placenta previa at mid\u2010term and the end of the third trimester. The averages of the bilateral ratio of uterine artery systolic to end\u2010diastolic maximum blood flow velocity (S\/D ratio), pulsatility index (PI) and resistance index (RI) were used for analysis.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The means of S\/D ratio, PI and RI of uterine arteries in the placenta previa group were significantly lower than that in either control group or resolving group. No differences were observed between control group and resolving group. The areas under the receiver operating characteristic curve were 0.7632, 0.7579 and 0.7644 for the means of S\/D ratio, PI and RI, respectively (<jats:italic>P<\/jats:italic>\u2009&lt;\u20090.0001).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>The means of S\/D ratio, PI and RI of the uterine arteries at mid\u2010term gestation are reduced in patients with persistent placenta previa, indicating unique pathogenic changes at mid\u2010term gestation, and have the potential to be a predictive factor on placenta previa resolution.<\/jats:p><\/jats:sec>","DOI":"10.1111\/jog.14246","type":"journal-article","created":{"date-parts":[[2020,4,13]],"date-time":"2020-04-13T06:50:00Z","timestamp":1586760600000},"page":"883-889","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Uterine artery Doppler velocimetry at mid\u2010term gestation as a potential predictive factor for the resolution of placenta previa at the end of third trimester of pregnancy"],"prefix":"10.1111","volume":"46","author":[{"given":"Yu","family":"Lu","sequence":"first","affiliation":[{"name":"Department of Ultrasound, Shanghai First Maternity and Infant Hospital Tongji University School of Medicine  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yilun","family":"Wu","sequence":"additional","affiliation":[{"name":"Department of Ultrasound, Shanghai First Maternity and Infant Hospital Tongji University School of Medicine  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lijuan","family":"Yang","sequence":"additional","affiliation":[{"name":"Department of Ultrasound, Shanghai First Maternity and Infant Hospital Tongji University School of Medicine  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fan","family":"Huang","sequence":"additional","affiliation":[{"name":"Department of Ultrasound, Shanghai First Maternity and Infant Hospital Tongji University School of Medicine  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4321-9980","authenticated-orcid":false,"given":"Min","family":"Ren","sequence":"additional","affiliation":[{"name":"Department of Ultrasound, Shanghai First Maternity and Infant Hospital Tongji University School of Medicine  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2020,4,12]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1097\/01.AOG.0000207559.15715.98"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1055\/s-2000-9269"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0029-7844(98)00480-3"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/0020-7292(94)90167-8"},{"key":"e_1_2_7_6_1","doi-asserted-by":"publisher","DOI":"10.1046\/j.1469-0705.1996.08050337.x"},{"key":"e_1_2_7_7_1","doi-asserted-by":"crossref","unstructured":"Complications of pregnancy. 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