Changes in sex hormones and their interactions are related to pain perception between different menstrual subphases

Table S1: We defined RPTs as the range between the pain tolerance and the pain threshold (RPT= pain tolerance-pain threshold) and found a significant correlation between pain threshold and pain tolerance in both the emF and mL phases

Table S2:There was no significant difference in the RPT between the emF and mL phase

Table S3: Relationship between pain perception_ratio and sex hormone_ratio by correlation analysis

Figure S1:The phase-specific ultrasound imaging features were as follows: the follicular phase was indicated by the appearance of dominant follicles and a thin homogenous echo in the endometrium; ovulation was indicated by the first appearance of dominant follicles measuring 16 to 28 mm in diameter, with their subsequent disappearance with or without detectable fluid in the pouch of Douglas; and after ovulation, the luteal phase was indicated by an thick endometrial 

Figure S2:Relationship between sex hormones ratio and pain perception ratio