{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T19:51:05Z","timestamp":1791489065733,"version":"4.3.4"},"reference-count":88,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2022,4,21]],"date-time":"2022-04-21T00:00:00Z","timestamp":1650499200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Cells"],"abstract":"<jats:p>Ovarian stimulation is an indispensable part of IVF and is employed to produce multiple ovarian follicles. In women who undergo ovarian stimulation with gonadotropins, supraphysiological levels of estradiol, as well as a premature rise in progesterone levels, can be seen on the day of hCG administration. These alterations in hormone levels are associated with reduced embryo implantation and pregnancy rates in IVF cycles with a fresh embryo transfer. This article aims to improve the reader\u2019s understanding of the effects of elevated progesterone levels on human endometrial receptivity and oocyte\/embryo quality. Based on current clinical data, it appears that the premature rise in progesterone levels exerts minimal or no effects on oocyte\/embryo quality, while advancing the histological development of the secretory endometrium and displacing the window of implantation. These clinical findings strongly suggest that reduced implantation and pregnancy rates are the result of a negatively affected endometrium rather than poor oocyte\/embryo quality. Understanding the potential negative impact of elevated progesterone levels on the endometrium is crucial to improving implantation rates following a fresh embryo transfer. Clinical studies conducted over the past three decades, many of which have been reviewed here, have greatly advanced our knowledge in this important area.<\/jats:p>","DOI":"10.3390\/cells11091405","type":"journal-article","created":{"date-parts":[[2022,4,22]],"date-time":"2022-04-22T05:07:22Z","timestamp":1650604042000},"page":"1405","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":47,"title":["Towards an Improved Understanding of the Effects of Elevated Progesterone Levels on Human Endometrial Receptivity and Oocyte\/Embryo Quality during Assisted Reproductive Technologies"],"prefix":"10.3390","volume":"11","author":[{"given":"Nischelle R.","family":"Kalakota","sequence":"first","affiliation":[{"name":"Department of Obstetrics, Gynecology and Reproductive Health, Rutgers Biomedical and Health Sciences, Rutgers University, Newark, NJ 07107, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lea C.","family":"George","sequence":"additional","affiliation":[{"name":"Department of Obstetrics, Gynecology and Reproductive Health, Rutgers Biomedical and Health Sciences, Rutgers University, Newark, NJ 07107, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sara S.","family":"Morelli","sequence":"additional","affiliation":[{"name":"Department of Obstetrics, Gynecology and Reproductive Health, Rutgers Biomedical and Health Sciences, Rutgers University, Newark, NJ 07107, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nataki C.","family":"Douglas","sequence":"additional","affiliation":[{"name":"Department of Obstetrics, Gynecology and Reproductive Health, Rutgers Biomedical and Health Sciences, Rutgers University, Newark, NJ 07107, USA"},{"name":"Center for Immunity and Inflammation, Rutgers Biomedical and Health Sciences, Rutgers University, Newark, NJ 07107, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andy V.","family":"Babwah","sequence":"additional","affiliation":[{"name":"Department of Pediatrics, Robert Wood Johnson Medical School, Rutgers Biomedical and Health Sciences, Rutgers University, Newark, NJ 07107, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,4,21]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"117","DOI":"10.1210\/er.2006-0022","article-title":"The molecular control of corpus luteum formation, function, and regression","volume":"28","author":"Stocco","year":"2007","journal-title":"Endocr. 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