Another retrospective cohort study performed in China including 25,165 IVF cycles showed that preterm deliveries were predominant among PCOS patients with AMH levels above the 75th percentile (9.75 ng/mL) (adjusted P<0.0001; AOR=4.0; 95% CI= 1.94-8.08)) and patients with frozen-thawed embryo transfer (FET) with AMH levels higher than the 90th percentile (10.10 ng/mL) (adjusted P<0.05; AOR=2.0; 95% CI=1.16-3.36) (9). The gene discussed is AMH; the disease is polycystic ovary syndrome.