CS exposure increases macrophages in maternal lungs.

<p>(A): Immunohistochemical staining in non-pregnant (upper panel) non-smoking (left) and smoking females (right) and in gestational day (GD) 18 pregnant (lower panel) non-smoking (left) and smoking (right) females. Original magnification is 200×. Arrows point to alveolar macrophages. (B): For quantification, macrophages were counted and normalized per mm lung tissue. CS-exposed samples were compared to non-exposed controls (*p<0.05, mean ± SEM, n = 2–4).