Vitrified-warmed blastocyst transfer on the 5th or 7th day of progesterone supplementation in an artificial cycle: a randomised controlled trial. (3rd October 2017)

• Record Type: Journal Article
• Authors: van de Vijver, A.; Drakopoulos, P.; Polyzos, N. P.; Van Landuyt, L.; Mackens, S.; Santos-Ribeiro, S.; Vloeberghs, V.; Tournaye, H.; Blockeel, C.
• Is Part Of: Gynecological endocrinology. Volume 33:Number 10(2017)
• Page Start: 783
• Page End: 786
• Publication Date: 2017-10-03
• Subjects: Blastocyst -- frozen embryo transfer -- implantation -- progesterone -- vitrification; Endocrine gynecology -- Periodicals; Generative organs, Female -- Diseases -- Periodicals; 618.1
• DOI: 10.1080/09513590.2017.1318376
• Languages: English
• ISSNs: 0951-3590

Abstract

Abstract: Prospective studies comparing different durations of progesterone supplementation before transfer of vitrified-warmed blastocysts in an artificial cycle are lacking. However, in oocyte donation programmes, the sporadic available evidence demonstrates considerable differences in clinical pregnancy rates according to the duration of progesterone administration. This randomised controlled trial (RCT), included 303 patients undergoing a frozen-thawed embryo transfer (FET) of one or two vitrified-warmed blastocyst(s) in an artificial cycle. Randomisation was performed when the endometrial thickness reached ≥7 mm after oestrogen supplementation. One hundred and fifty two patients in group A received 7 d of vaginal micronised progesterone tablets and 151 patients in group B received 5 d of micronised vaginal progesterone before FET. No differences were seen in clinical pregnancy rate between both groups: 42/152 (27.6%) in group A versus 49/151 (32.5%) in group B. Although no statistically significant difference was observed in clinical pregnancy rates, our study was powered to detect an absolute difference of 16%. In this regard, we cannot exclude that smaller, clinically relevant differences might exist and our study did not have the power to detect this. Patients were also not blinded for the intervention, causing a potential bias.