High Rate of Chronic Villitis in Placentas of Pregnancies Complicated by Influenza A/H1N1 Infection

Table 2

Baseline characteristics and pregnancy outcome of pregnant women with 2009 influenza A/H1N1 infection during pregnancy whose placentas were examined.

Number of patients (𝑛)	15
Age (y)
Mean (SD)	33 (5,8)
Parity
Nulliparous (𝑛 (%))	5 (33)
Parous (𝑛 (%))	10 (67)
Comorbidity
None (𝑛 (%))	11 (73)
Asthma (𝑛 (%))	1 (7)
Hypertension (𝑛 (%))	1 (7)
Other systemic diseases* (𝑛 (%))	2 (13)
Mode of delivery
Vaginal delivery (𝑛 (%))	10 (67)
Cesarean section (𝑛 (%))	5 (33)
Gestational age
Mean (days (SD))	280 (10)
Preterm <37 weeks (𝑛 (%))	1 (7)
Preterm <34 weeks (𝑛 (%))	0 (0)

∗One patient had rheumatoid arthritis and one patient had polycystic ovary syndrome.