CRP and placenta praevia: Through univariate logistic regression, we found that GA and BW were positively associated with CRP ≥ 8 mg/L, the risk of CRP ≥ 8 mg/L increased by 26% for one week increase in GA (P < 0.001);Antenatal steroids, placenta previa, and delivery mode(Cesarean delivery) were negatively associated with CRP ≥ 8 mg/L, with a 53%,82% and 69% reduction in the risk of CRP ≥ 8 mg/L respectively (All P < 0.01); PROM (≥ 18 h), maternal autoimmune diseases and MAS were positively associated with CRP ≥ 8 mg/L, with an increased risk of CRP ≥ 8 mg/L by 77%, 367% and 387%, respectively (All P < 0.05).