Fig. 1From: Gonadotropin-releasing hormone antagonist versus progestin for the prevention of premature luteinising hormone surges in poor responders undergoing in vitro fertilisation treatment: study protocol for a randomised controlled trialFlowchart of this randomised controlled trial comparing PPOS with a GnRH antagonist in poor responders. ET embryo transfer, FET frozen-thawed embryo transfer, GnRH gonadotrophin-releasing hormone, ITT intention to treat, LH luteinising hormone, PPOS progestin-primed ovarian stimulationBack to article page