Table 1. Injection of LPS induced preterm labor of mice.

Treatment	N	Injection-to-delivery Interval (hours)
Normal Saline	12	124.38±6.76
LPS 0.2mg/kg	12	95.67±49.21
LPS 0.4mg/kg	12	7.66±0.89 a
LPS 0.8mg/kg	12	6.75±0.67 b

a: p = 2.01×10⁻⁶ compared with NS group

b: p = 1.9×10⁻⁶ compared with NS group