{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T20:56:24Z","timestamp":1790283384924,"version":"4.1.0"},"reference-count":34,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2024,7,15]],"date-time":"2024-07-15T00:00:00Z","timestamp":1721001600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Ultrasound in Obstet &amp;amp; Gyne"],"published-print":{"date-parts":[[2024,9]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:sec><jats:title>Objective<\/jats:title><jats:p>To investigate whether immediate frozen\u2013thawed embryo transfer (FET) in the next month following coronavirus disease 2019 (COVID\u201019) recovery affects ongoing pregnancy outcome.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>This was a retrospective cohort study carried out at a university\u2010affiliated reproductive medicine center. The study group (post\u2010COVID\u201019 group) comprised women who were affected by COVID\u201019 in December 2022 and immediately underwent FET in January 2023 after recovery, with transferred embryos not exposed to the infection. The control group comprised women treated during the pre\u2010COVID\u201019 period (January 2019). Multivariable logistic regression analysis and a propensity score matching (PSM) approach were used to control for potential confounders and selection bias.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>A total of 200 women were included in the post\u2010COVID\u201019 group and 641 women were enrolled in the control group. The rate of ongoing pregnancy was comparable between the study cohorts in both the unadjusted and confounder\u2010adjusted logistic regression models. Other reproductive outcomes, including the odds of a positive pregnancy test, implantation, clinical pregnancy and early pregnancy loss, were similar between the comparison groups. PSM models further confirmed the lack of significant differences in pregnancy outcome between the post\u2010COVID\u201019 group and the control group.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Among patients affected by COVID\u201019 for whom the transferred embryos were generated prior to infection, an immediate FET cycle in the next month after recovery does not seem to compromise ongoing pregnancy outcome. Thus, women who have frozen embryos from preinfection cycles should be counseled and encouraged to undergo FET as soon as possible after COVID\u201019 recovery. \u00a9 2024 International Society of Ultrasound in Obstetrics and Gynecology.<\/jats:p><\/jats:sec>","DOI":"10.1002\/uog.27630","type":"journal-article","created":{"date-parts":[[2024,3,4]],"date-time":"2024-03-04T18:57:36Z","timestamp":1709578656000},"page":"388-394","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Immediate application of frozen\u2013thawed embryo transfer cycle in month following <scp>COVID<\/scp>\u201019 recovery does not impair ongoing pregnancy outcome"],"prefix":"10.1002","volume":"64","author":[{"given":"Q.","family":"Xu","sequence":"first","affiliation":[{"name":"Department of Assisted Reproduction, Shanghai Ninth People's Hospital Shanghai Jiao Tong University School of Medicine  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"X.","family":"Mao","sequence":"additional","affiliation":[{"name":"Department of Assisted Reproduction, Shanghai Ninth People's Hospital Shanghai Jiao Tong University School of Medicine  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3154-8215","authenticated-orcid":false,"given":"J.","family":"Zhang","sequence":"additional","affiliation":[{"name":"Department of Assisted Reproduction, Shanghai Ninth People's Hospital Shanghai Jiao Tong University School of Medicine  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"L.","family":"Wu","sequence":"additional","affiliation":[{"name":"Department of Assisted Reproduction, Shanghai Ninth People's Hospital Shanghai Jiao Tong University School of Medicine  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2024,7,15]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1056\/NEJMoa2001017"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1093\/humrep\/deaa075"},{"key":"e_1_2_8_4_1","unstructured":"World Health Organization. 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