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Ultrasound in Obstetrics & GynecologyEarly View Correspondence Reply R. Cioffi, R. Cioffi orcid.org/0000-0003-4370-8271 Department of Obstetrics and Gynaecology, IRCCS San Raffaele Scientific Institute, Milan, ItalySearch for more papers by this authorP. I. Cavoretto, Corresponding Author P. I. Cavoretto [email protected] orcid.org/0000-0001-8097-366X Department of Obstetrics and Gynaecology, IRCCS San Raffaele Scientific Institute, Milan, Italy School of Medicine, Vita-Salute University San Raffaele, Milan, Italy Correspondence. (e-mail: [email protected])Search for more papers by this authorG. Mangili, G. Mangili orcid.org/0000-0002-8451-429X Department of Obstetrics and Gynaecology, IRCCS San Raffaele Scientific Institute, Milan, ItalySearch for more papers by this author R. Cioffi, R. Cioffi orcid.org/0000-0003-4370-8271 Department of Obstetrics and Gynaecology, IRCCS San Raffaele Scientific Institute, Milan, ItalySearch for more papers by this authorP. I. Cavoretto, Corresponding Author P. I. Cavoretto [email protected] orcid.org/0000-0001-8097-366X Department of Obstetrics and Gynaecology, IRCCS San Raffaele Scientific Institute, Milan, Italy School of Medicine, Vita-Salute University San Raffaele, Milan, Italy Correspondence. (e-mail: [email protected])Search for more papers by this authorG. Mangili, G. Mangili orcid.org/0000-0002-8451-429X Department of Obstetrics and Gynaecology, IRCCS San Raffaele Scientific Institute, Milan, ItalySearch for more papers by this author First published: 17 October 2025 https://doi.org/10.1002/uog.70125 Linked article: This is a response to the comment by Li et al. Click here to view the Correspondence. Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookxLinkedInRedditWechatBluesky No abstract is available for this article. References 1Cioffi R, Cavoretto PI, Sabetta G, et al. Additional value of uterine artery Doppler pulsatility index for ultrasound diagnosis of placental site trophoblastic tumor: prospective cohort study. Ultrasound Obstet Gynecol. 2025; 66: 73-80. 10.1002/uog.29235 CAS PubMed Web of Science® Google Scholar 2Peduzzi P, Concato J, Kemper E, Holford TR, Feinstein AR. A simulation study of the number of events per variable in logistic regression analysis. J Clin Epidemiol. 1996; 49(12): 1373-1379. 10.1016/S0895-4356(96)00236-3 CAS PubMed Web of Science® Google Scholar 3Vittinghoff E, McCulloch CE. Relaxing the rule of ten events per variable in logistic and Cox regression. Am J Epidemiol. 2007; 165(6): 710-718. 10.1093/aje/kwk052 PubMed Web of Science® Google Scholar 4Sladkevicius P, Valentin L, Marsál K. Transvaginal Doppler examination of uteri with myomas. J Clin Ultrasound. 1996; 24(3): 135-140. 10.1002/(SICI)1097-0096(199603)24:3<135::AID-JCU5>3.0.CO;2-I CAS PubMed Web of Science® Google Scholar 5Moon JW, Kim CH, Kim JB, Kim SH, Chae HD, Kang BM. Alterations in uterine hemodynamics caused by uterine fibroids and their impact on in vitro fertilization outcomes. Clin Exp Reprod Med. 2015; 42(4): 163-168. 10.5653/cerm.2015.42.4.163 PubMed Google Scholar Early ViewOnline Version of Record before inclusion in an issue ReferencesRelatedInformation