Aerts L, Assche F A
Diabetologia. 1975 Aug;11(4):285-9. doi: 10.1007/BF00422393.
The ultramicroscopic appearence of the B-cell of the pregnant rat suggests hyperinsulinism of the individual beta cell. In pregnant rats the B-cell contains an increased volume and an increased number of light granules as well as enlarged mitochondria.