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Immediate versus postponed frozen embryo transfer after IVF/ICSI: a systematic review and meta-analysis.

Sara Johanna BergenheimMarte SaupstadNina PistoljevicAnders Nyboe AndersenJulie Lyng FormanKristine LøsslAnja Pinborg
Published in: Human reproduction update (2022)
The results of this review indicate a slightly higher LBR and CPR in immediate versus postponed FET. Thus, the standard clinical practice of postponing FET for at least one menstrual cycle following a failed fresh transfer or a freeze-all cycle may not be best clinical practice. However, as only retrospective cohort studies were assessed, the presence of selection bias is apparent, and the quality of evidence thus seems low. Randomised controlled trials including data on cancellation rates and reasons for cancellation are highly needed to provide high-grade evidence regarding clinical practice and patient counselling.
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