Table 1 shows the baseline characteristics of the normal group and puerperal infection group. Parity, albumin at admission, number of vaginal examinations, amniotic fluid volume, amount of bleeding, PROM, antibiotics administered within one week before admission, induced labor, amniotic fluid color, mode of delivery, suturing the uterine cavity during cesarean section to stop bleeding, and indwelling catheter were statistically significant between the two groups in the training dataset (P < 0.05). The gene discussed is ALB; the disease is puerperal infection.