PLOD1 and endometriosis: The LH values gradually decreased during ovarian stimulation, and the mean LH levels on the trigger day was significantly lower than the basal LH values in the two endometriosis groups (surgery group: 3.30 vs. 1.57 IU/L; aspiration group: 3.54 vs. 1.67 IU/L; short protocol group: 5.61 vs. 4.67 IU/L) and then increased significantly (surgery group: 58.15 IU/L; aspiration group: 60.90 IU/L; short protocol group: 9.11 IU/L; P < 0.001) 10 h after trigger.