Cell morphology. The microphotographs are representative of the different cell morphologies of MSC taken from the Sham group (a) and of ovariectomized rats as shown here for the OVX + Diet group (b). The MSCs of the Sham group (a) are smaller and have a rather spindle-shaped cell morphology, whereas cells of the OVX + Diet group (b) mainly consisted of a more broad and flattened cell type.