According to Puppe's Rule, when can fractures be expected to stop?

Puppe's Rule suggests that fractures will stop propagating at the site of existing fracture lines. This is based on the understanding that once a fracture has occurred, it generates a line of weakness in the bone. When new stresses are applied, the propagation of new fractures will halt upon reaching these pre-existing lines.

This principle illustrates the mechanics of bone behavior under stress and highlights how previous injuries influence the likelihood of further fractures. The areas where the bone has already fractured become zones of stability, reducing the chance for new fractures to occur in those regions.

The other options lack relevance to the guiding principles of Puppe's Rule. For example, while impact is a crucial factor in the initiation of fractures, it does not dictate when the propagation of fractures ceases. Likewise, time periods like "after 5 months" and factors such as weather conditions are not scientifically grounded in Puppe's Rule regarding fracture propagation.