, was administered to breeding females at 85 to 91 days of gestation. Gilts originating from an off-site gilt-developer unit were vaccinated twice after arrival at the breeding herd, at 100 and 110 kg of body weight. Piglets received one dose of PCV2 vaccine (Circumvent PCV M; Intervet/Schering-Plough Animal Health, Omaha, Nebraska) at weaning.