PLOD1 and endometriosis: Regarding the endometriosis patients treated prior to IVF, the predictors of pregnancy achievement were basal serum levels of P4 (p = 0.042); FSH (p = 0.017), LH (p = 0.038), and AMH levels (p = 0.006); and the use of the long stimulation protocol (p = 0.034).