{"title":"Avoiding weekend frozen embryo transfer in modified natural cycles: is it possible?","authors":"Barbara Lawrenz , Christophe Blockeel","doi":"10.1016/j.rbmo.2023.103775","DOIUrl":null,"url":null,"abstract":"<div><p>In this era of the freeze-all strategy, the prevalence of frozen embryo transfer (FET) cycles is increasing rapidly. Although still quite often used, the hormone replacement therapy cycle to prepare a FET should now belong to the past, unless strictly necessary. This raises questions about possible flexible protocols for the preparation of an FET cycle in a (modified) natural cycle. In this viewpoint, an overview of the different options is discussed, stressing the importance of the corpus luteum.</p></div>","PeriodicalId":21134,"journal":{"name":"Reproductive biomedicine online","volume":"49 1","pages":"Article 103775"},"PeriodicalIF":3.5000,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Reproductive biomedicine online","FirstCategoryId":"3","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S147264832300874X","RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"OBSTETRICS & GYNECOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
In this era of the freeze-all strategy, the prevalence of frozen embryo transfer (FET) cycles is increasing rapidly. Although still quite often used, the hormone replacement therapy cycle to prepare a FET should now belong to the past, unless strictly necessary. This raises questions about possible flexible protocols for the preparation of an FET cycle in a (modified) natural cycle. In this viewpoint, an overview of the different options is discussed, stressing the importance of the corpus luteum.
在这个 "全部冷冻"（freeze-all）策略的时代，冷冻胚胎移植（FET）周期的使用率正在迅速上升。尽管为准备 FET 而进行的 HRT 周期仍经常被使用，但除非绝对必要，否则现在应该属于过去式了。这就提出了一个问题：在（改良的）自然周期中准备 FET 周期的灵活方案是否可行？本文将对不同的方案进行综述，并强调黄体的重要性。
期刊介绍：
Reproductive BioMedicine Online covers the formation, growth and differentiation of the human embryo. It is intended to bring to public attention new research on biological and clinical research on human reproduction and the human embryo including relevant studies on animals. It is published by a group of scientists and clinicians working in these fields of study. Its audience comprises researchers, clinicians, practitioners, academics and patients.
Context:
The period of human embryonic growth covered is between the formation of the primordial germ cells in the fetus until mid-pregnancy. High quality research on lower animals is included if it helps to clarify the human situation. Studies progressing to birth and later are published if they have a direct bearing on events in the earlier stages of pregnancy.
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