No – if you use the MaleEdge penis extender completely correctly, you can grow your penis risk-free, with no side effects. Use of the MaleEdge extender will not affect fertility, stamina, urination or quality of erection. In fact, many users report improved erection and stamina after using the MaleEdge extender for a while, due to the increased blood flow from the treatment. Read more about the effect on erection from using the MaleEdge extender here.