Figure 5: SSEA-4 labeling distribution in the right atrium and right auricle of fetal, pregnant and adult sheep.Representative images of the right auricle and right atrium from fetal, pregnant and adult sheep are shown (magnitude 200×). Niche-like SSEA-4 positive areas labeled with FITC were observed in right auricle and right atrium tissues from fetal sheep samples, but were not identified in the left ventricle and apex. The SSEA-4 positive areas in the right auricle, right atrium and left ventricle from pregnant adults and non-pregnant adults were sparse.