Moreover, the ratio of LH to FSH concentrations was calculated and it was observed statistically significant higher ratio in women with endometriosis (Me = 1.3, [Q1-Q3] = [0.8–2.1]) compared to healthy women (Me = 0.5, [Q1-Q3] = [0.3–0.7]). Here, PLOD1 is linked to endometriosis.