It is not unusual for shedding to continue or even increase when first starting a treatment for hair loss be it Rogaine, Finasteride or PRP. Hair follicles may increase in growth rate or increase diameter a little while in the growing stage, but it is not possible for hair to undergo a noticeable change in size during this stage. The reason for this is that the follicles must go into dormancy or the telogen “resting” phase so it can begin to restructure its processes to produce a thicker, stronger hair.