https://www.cdc.gov/parvovirusb19/pregnancy.html 50 percent of pregnant women Pregnancy and Fifth Disease percent CDC: Pregnancy and Fifth Disease https://www.cdc.gov/parvovirusb19/pregnancy.html https://www.cdc.gov/parvovirusb19/pregnancy.html Less than 5 percent of pregnant women slapped cheek https://www.cdc.gov/parvovirusb19/pregnancy.html According to the CDC Parvovirus B19 and Fifth Disease in pregnancy Parvovirus B19 and fifth disease Centers for Disease Control and Prevention pregnant