Abstract
Studies demonstrate that prolonged premature elevations in progesterone (P) levels during controlled ovarian stimulation have adverse effects on IVF outcomes, potentially due to alterations in endometrial receptivity. Cryopreservation with a subsequent frozen embryo transfer (FET) has been proposed as a method of overcoming embryo-endometrium asynchrony. The purpose of this study was to evaluate whether elective cryopreservation (“freeze all”) improves pregnancy outcomes in patients with prolonged premature P elevation during an IVF cycle.
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