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Lung dysplasia in DelA/Y male embryos. (A) Asphyxia in E18.5 DelA/Y male pups. Wild-type pups breathed normally. Pups were delivered at E18.5 by cesarean section. (B–D) Histological analysis of lung from embryos at E16.5 (B), E17.5 (C) and E18.5 (D). Lung sections were stained with hematoxylin and eosin. Genotypes: WT, +/Y; DelA/Y, −/Y.
