News Men’s health: Penis length has grown 24% in recent decades. That may not be good news. February 14, 2023February 14, 2023Karen Weintraub, USA TODAYComments Off on Men’s health: Penis length has grown 24% in recent decades. That may not be good news. Some male fertility experts are concerned after a recent study found the average penile length increased by 24% over the last 29 years.