638928.fig.007
Figure 7: Definitive collapsing atresia (1.4 mm) forming folds, with theca interna (TI) totally hyalinised, while the theca externa is dedifferentiated and stratum granulosum (SG) is fibrotic. (Ewe 17 days postpartum, staining Azan, 500 μm bar, 100x).