DPP4 and polycystic ovary syndrome: B: Benefits; R: Risks; HbA1c: Hemoglobin A1c; LDL: Low-density lipoproteins; LH: Luteinizing hormone; BMI: Body mass index; AST: Aspartate aminotransferase; OGTT: Oral glucose tolerance test; SHBG: Sex hormone binding globulin; IVF: In Vitro Fertilization; B-hCG: Beta-human chorionic gonadotropin hormone; GLP-1 RA: Glucagon-like peptide –1 receptor agonist; DPP4: Dipeptidyl peptidase 4; PCOS: Polycystic ovarian syndrome; USA; United States of America; UAE; United Arab Emirates.