PRL and endometriosis: In our study, we observed that women with endometriosis had higher levels of prolactin, despite being within the reference value, when compared to fertile women without the disease; in addition, we did not find a significant difference for prolactin values considering the stage of the disease (13.5 ng/mL (7.6–19.3) versus 15.2 ng/mL (10.5–20.2), respectively in minimal/mild and moderate/severe endometriosis; p = 0.410).