The mean preoperative Gal-1 concentration in the endometriosis cohort (n = 80) was 18.22 ± 3.94 ng/mL (95% CI: 17.35–19.10), whereas healthy control samples (n = 15) showed a mean level of 15.74 ± 2.66 ng/mL (95% CI: 14.26–17.21; p = 0.030) (Figure 1). Here, LGALS1 is linked to endometriosis.