PRL and Insulin resistance: FSH, follicle-stimulating hormone; LH, luteinizing hormone; E2, oestradiol; P, progesterone; PRL, prolactin; T, testosterone; AMH, anti-Müllerian hormone; FT3, free triiodothyronine; FT4, free thyroxin; TSH, thyroid stimulating hormone; HOMA-IR, Homeostatic Model Assessment for Insulin Resistance; ACA, anticardiolipin antibody; ANA, antinuclear antibody; A-β2-GPI, anti-β2-glycoprotein I antibody; TG-Ab, anti-thyroglobulin antibody; TPO-Ab, anti-thyroid peroxidase antibody.