Is the staying duration of the most human cells in each stage (G1, G2, S) comparable to the other stage? For example, is it true to say that most human cells, which have the ability to divide (passing the cell cycle), spend most of their lives in stage G1 than S phase or vice versa? Usually, which stage is the longest or shortest? It is quite clear that G1 is normally longer than G2, and as far as I know, G2 is the shortest stage in interphase, but what about G1 and S? Is stage S usually longer than G1? Is there any information?