CDC analyzed data from an Internet panel survey conducted October 30-November 13, 2013, among women who were pregnant any time since August 2013. The results of this survey provide information for use in vaccination campaigns during National Influenza Vaccination Week (December 8-14, 2013). This report provides early flu season (early November) estimates of vaccine uptake by pregnant women. Final 2013-14 flu season coverage estimates for pregnant women will become available after the end of the flu season.