PRL and Infertility: In the first study [76] they, consistent with a study by Albu et al. [35], found inverse correlations between serum PRL and BMI, as well as TG, TC, and LDL-C in patients with PCOS, and showed that even after the adjustment for BMI, levels of these markers are still significantly higher in PCOS than in non-PCOS infertile patients.