INS and type 2 diabetes mellitus: A meta-analysis of 39 studies evaluated which risk factors were more associated with progression to T2DM and found that a higher pre-gestational body mass index (BMI), a family history of T2DM, non-white ethnicity, an early diagnosis of GDM, increased HbA1c, use of insulin during pregnancy, hypertensive disorders of pregnancy, multiparity, and preterm delivery were the most associated factors [6].