Table 1.

Basic Information and clinical manifestation for 55 cases student's test, Chi- square test were used.

Groups	Confirmed group (n = 13)	Control group (n = 42)	t/x2	P
Age (y, $\overline{\mathrm{X}}$ ± s)	30.2 ± 2.3	29.8 ± 3.4	0.410	0.681
Body mass index (kg/m2, $\overline{\mathrm{X}}$ ± s)	20.39±2.33	21.38±2.76	−0.980	0.331
Prenatal fever (n,%)	2, 15.4	11, 26.2	0.642	0.725
Postpartum fever (n,%)	8, 61.5	20, 47.6	0.770	0.681
Delivery mode(n,%)
Vaginal delivery	4, 30.8	12, 28.6	0.023	0.988
Cesarean delivery	9, 69.2	30, 71.4
Newborn gender (n,%)
Male	8, 57.1	28, 65.1	0.289	0.866
Female	6, 42.9	15, 34.9
Newborn weight (g,$\overline{\mathrm{X}}$ ± s)	3063.2 ± 536.4	3317.1 ± 522.5	−1.570	0.122
gestational week of newborn (w,$\overline{\mathrm{X}}$ ± s)	38.2 ± 2.3	38.8 ± 1.8	−1.286	0.210
Volume of postpartum hemorrhage(mL, X ± s)	356.1 ± 45.4	336.9 ± 93.6	0.713	0.479