A collaboration between the colleges of Southampton, UK, and Bergen, Norway, put ahead the eye-opening speculation.
Dr Negusse Kitaba, a analysis fellow on the University of Southampton, stated "stem cells are being established" throughout puberty, earlier than the age of 15.
During this time, the established stem cells "will make sperm for the rest of their lives".
Examining 875 folks aged between seven and 50, and the smoking behaviour of their fathers, they discovered that smoking earlier than the age of 15 might trigger generational well being points.
Smoking elevated the possibilities of their youngsters creating asthma, obesity and lung issues, the scientists stated.
These findings have been "much more pronounced" in youngsters whose fathers began smoking throughout puberty, in comparison with those that began smoking at any time earlier than conception.
Dr Kitaba stated: "It's deeply worrying that teenagers today, especially teenage boys, are now being exposed to very high levels of nicotine through vaping.
"We cannot positively be certain vaping could have related results throughout generations, however we should not wait a few generations to show what impression teenage vaping might need."
Dr Cesar Diaz-Garcia cautioned: "For males specifically, the connection between tobacco and infertility is difficult to disregard.
"Tobacco smoking is one of the major factors leading to male infertility."
Smoking is linked to low sperm counts, poor sperm motility (the potential for the sperm to swim) and sub-optimum sperm high quality.
Dr Diaz-Garcia famous: "Male smokers can expect an average 23 percent decrease in sperm concentration.
"Heavy people who smoke, those that take pleasure in 20 or extra day by day, will see their fertility endure probably the most."
Dr Diaz-Garcia stated male people who smoke have an elevated danger of fertilisation points and miscarriage.
In addition to fertility points, smoking is well-known to extend the chance of illness.
For assist to quit smoking, assist companies can be found at pharmacies and out of your GP.
Call the free Smokefree National Helpline on 0300 123 1044.
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