Fig. 2From: Association between abnormal body mass index and pregnancy outcomes in patients following frozen embryo transfer: a systematic review and meta-analysisOverall effect of high BMI on the live birth rate. ‘Events’ relates to FET cycles leading to live birth, and ‘Total’ relates to the total number of FET cycles included in the study. A high BMI was considered BMI ≥ 23 kg/m2, and a normal weight was considered BMI 18.5–22.9 kg/m2Back to article page