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dc.contributor.authorAndersen, Claus Yding
dc.contributor.authorKelsey, Tom
dc.contributor.authorMamsen, Linn
dc.contributor.authorVuong, Lan Ngoc
dc.identifier.citationAndersen , C Y , Kelsey , T , Mamsen , L & Vuong , L N 2020 , ' Shortcomings of an unphysiological triggering of oocyte maturation using human chorionic gonadotropin ' , Fertility and Sterility , vol. 114 , no. 2 , pp. 200-208 .
dc.identifier.otherPURE: 267943905
dc.identifier.otherPURE UUID: 085cd017-d09d-43b5-90a8-d4dd55fb78ee
dc.identifier.otherORCID: /0000-0002-8091-1458/work/77524698
dc.identifier.otherScopus: 85087706641
dc.identifier.otherWOS: 000555005700004
dc.description.abstractFinal maturation of follicles has, in connection with ovarian stimulation and infertility treatment, traditionally been achieved by the administration of a human chorionic gonadotropin (hCG) bolus trigger of 5,000 to 10,000 IU. This trigger serves two purposes: induce oocyte maturation; and serve as luteal phase support owing to its long half-life. It now appears that the hCG bolus trigger is unable to support both these two purposes optimally. In particular, after an hCG trigger, the early luteal phase is hormonally abnormal and different from conditions observed in the natural menstrual cycle: the timing of the initiation of hCG and progesterone rise is much faster after an hCG trigger than in a natural menstrual cycle; the maximal concentrations of hCG and progesterone considerably exceed those naturally observed; and the timing of the peak progesterone concentration after an hCG trigger is advanced several days compared with the natural cycle. Furthermore, the hCG trigger without any follicle-stimulating hormone activity may induce oocyte maturation less efficiently than the combined luteinizing hormone and follicle-stimulating hormone surge normally seen. Collectively, the endometrium is likely to be advanced after an hCG trigger, and the implantation potential is probably not optimal. The precise effect on pregnancy rates after the different progressions of hCG and progesterone concentrations during the early luteal phase has not yet been determined, but more individualized methods using more physiological approaches are likely to improve reproductive outcomes.
dc.relation.ispartofFertility and Sterilityen
dc.rightsCopyright © 2020 American Society for Reproductive Medicine, Published by Elsevier Inc. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at
dc.subjectEarly luteal phaseen
dc.subjectEarly progesterone riseen
dc.subjectEndometrial advancementen
dc.subjecthCG triggeren
dc.subjectQA75 Electronic computers. Computer scienceen
dc.subjectRG Gynecology and obstetricsen
dc.titleShortcomings of an unphysiological triggering of oocyte maturation using human chorionic gonadotropinen
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews.School of Computer Scienceen
dc.contributor.institutionUniversity of St Andrews.Centre for Interdisciplinary Research in Computational Algebraen
dc.description.statusPeer revieweden

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