The results of univariate analysis with regard to SPTD ≤48 hours vs. >48 hours showed higher median serum CRP and CVF VDBP levels, a lower rate of nulliparity, and a higher rate of positive AF culture in the women who delivered preterm within 48 hours than in those who delivered preterm after 48 hours. The gene discussed is CRP; the disease is atrial fibrillation.