INS and gestational diabetes: Multivariate logistic regression demonstrated that maternal age ≥ 35 years [OR: 2.91, 95% CI: (1.28–6.62)], high serum FBS [1.10: (1.04–1.16)], HbA1c [1.91 (1.09–3.34)], and ART treatment [2.94: (1.24–6.96)] were independent risk factors for insulin therapy in GDM women.