Fig. 1From: The Protective Role of Endogenous Estrogens in Carrageenan-Induced Lung Injury in the RatAllen-Doisy assay. Vaginal smears with the presence of cornfield cells (A) with large squamous epithelial cells or with a few leukocytes and nucleated epithelial cells indicate that the rats are in the estrous or metaestrus, respectively, phase of the cycle. Only rats in estrus were used in the N-OVX group. Original magnification ×145.Back to article page