Figure 1From: Evaluation of the reproductive system development and egg-laying performance of hens infected with TW I-type infectious bronchitis virusCystic dilatation of the oviduct. A Well-developed oviduct of a 140-day-old chicken in the control group. B, C Oviduct cysts and developmental delay of the reproductive system in chickens from the challenge group at 140 days of age. D, E Oviduct cysts in chickens from the challenge group at 200 days of age.Back to article page