Fig. 2.

Coronal views through the largest diameter of the testes in a male that was kept in short days (SD) and photosensitive (week 0), transferred into long days (LD) and scanned after 4 and 10 weeks and then returned to SD and scanned 4 weeks later. Note that at this last time point testes were very small and no longer in the same plane so that only one of them can be seen in the same coronal section (arrows). The bottom panel illustrates the mean of the diameter of the two testes at these different time points.