There is nothing like permanent inhibition, testicular cells have excellent capacity of regeneration and hence your fertility
should come back. Smoking
damages the sperm. The good news is the damage done from smoking can be reversed .New research suggests that folic acid
can boost sperm health. Men with low levels of folate
had increased risks for sperm that contained too little or too many chromosomes. Have a diet containing Folic acid and Zinc. Fuits, Sprouted cereals will be highly beneficial.
Drink lots of water, think positively, every thing should be fine.