{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,4]],"date-time":"2026-03-04T01:17:04Z","timestamp":1772587024661,"version":"3.50.1"},"reference-count":26,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2021,9,16]],"date-time":"2021-09-16T00:00:00Z","timestamp":1631750400000},"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":[[2022,6]]},"abstract":"<jats:sec><jats:title>Objectives<\/jats:title><jats:p>The aim of our study was to compare the live birth rate following fresh embryo transfer (ET) during in vitro fertilization (IVF) in women with or without endometrial compaction in thickness and volume between the day of human chorionic gonadotrophin (hCG) and the ET day.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>This is a retrospective analysis of infertile women undergoing the first IVF cycle with fresh ET. A single operator performed all the ultrasound measurements for endometrial thickness and endometrial volume using three\u2010dimensional ultrasound. Endometrial compaction was calculated as the difference of the measurement between the hCG day and ET day. The predictive values of age of women, number of embryos transferred, and endometrial compaction in thickness and volume on live birth were studied.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>A total of 268 women who underwent the first IVF cycle with fresh ET between June 2005 and August 2006 were included in this retrospective analysis. Endometrial thickness was significantly higher on the ET day than the hCG day while endometrial volume was significantly smaller on the ET day than the hCG day. Women with a live birth were younger, had a higher serum estradiol level on the hCG day, and similar absolute or percentage change of endometrial thickness and volume when compared to those without a live birth.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Endometrial thickness and volume compaction was not a significant predictor of live birth in the multivariate logistic regression model. Endometrial thickness and volume compaction did not affect the live birth rate in the fresh IVF cycle.<\/jats:p><\/jats:sec>","DOI":"10.1002\/jum.15830","type":"journal-article","created":{"date-parts":[[2021,9,16]],"date-time":"2021-09-16T13:53:00Z","timestamp":1631800380000},"page":"1455-1463","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Impact of Endometrial Thickness and Volume Compaction on the Live Birth Rate Following Fresh Embryo Transfer of In Vitro Fertilization"],"prefix":"10.1002","volume":"41","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4882-5151","authenticated-orcid":false,"given":"Mei T.","family":"Lam","sequence":"first","affiliation":[{"name":"Department of Obstetrics and Gynaecology The University of Hong Kong, Queen Mary Hospital  Pokfulam Hong Kong China"},{"name":"Department of Obstetrics and Gynaecology Kwong Wah Hospital  Kowloon Hong Kong China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hang W. 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