For this very crude morph attempt from the 2000s, 5 puberty time-lapse photos were morphed together. The goal was to interpolate about 100 "virtual" frames showing the normal female growth process.
While limited, it does show the almost Hulk-like growth acceleration that occurs at the peak of female puberty. Her upper torso appears to be coming closer instead of enlarging equally in all directions. The process of her shoulders widening is more dramatic than the breast expansion swelling.
Girls get a lot stronger then. For a year or 2, they are bigger than boys their own age.
By dragging the video slider it can be played backwards or forward.