Figure 2 shows the allelic and genotypic frequencies of the LEP and LEPR SNPs for each symptom among endometriosis cases. Women with chronic pelvic pain and dyspareunia had a higher frequency of the variant genotype (AG+GG) and allele (G) of the LEPR rs1137100 SNP compared to women without pelvic pain and dyspareunia. While for the LEP rs7799039 SNP, no significant differences in the prevalence of symptoms were found. Here, LEP is linked to endometriosis.