Smoking And Sperm Health

Everyone knows that smoking has significant health hazards ranging from lung diseases to cancers. But are smoking and sperm interlinked?

The answer is: Yes. Smoking can hurt your sperm parameters and can even contribute to male infertility.

The relationship between smoking and male fertility is interesting. You may be thinking that plenty of men who smoke go on to have healthy children.

That’s true.

Smoking does not always mean infertility. However, if you look at your semen analysis results, sperm parameters may have prominent alterations due to smoking.

This article will review the relationship between smoking and sperm health, and its possible impacts on sperm parameters or male infertility.

How Are Smoking And Sperm Health Interlinked?

Tobacco smoking is loaded with toxic chemicals and mutagens. They not only influence the lungs but almost all cells of your body — including sperm. The effects of tobacco on sperm cells are well-documented. The research studies suggest the following issues with sperm health:

1. Smoking Decreases Sperm Concentration And Sperm Count

The total sperm count and density face a major blow due to tobacco. The toxic chemicals in cigarette smoke kill sperm cells, reducing their quantity per ejaculate. The research shows that the sperm count of men who smoke declines by 16%, which decreases the chances of fertilization.

2. Smoking Inhibits Sperm Motility

Tobacco destroys some enzymes responsible for the production of energy in sperm cells. The mitochondria in the midpiece of sperm become incapable of providing fuel for movement. So, the possibility of forward progression and motility of sperm diminishes.

3. Smoking Causes DNA Fragmentation

The analysis of seminal fluid in smokers shows a deficiency of zinc. As zinc plays a crucial role in protecting sperm cells from chromatin damage, DNA fragmentation is predictable. Due to this damage to chromatin, tobacco causes poor fertilization outcomes and recurrent miscarriages.

4. Smoking Damages Sperm Morphology

The sperm morphology or shape of sperm deteriorates with tobacco smoking. You need to have at least 4% of structurally robust sperm cells to achieve fertilization. Smoking decreases this proportion due to head, tail, or other defects in shape.

5. Smoking Reduces Seminal Volume

The optimum range of seminal volume is imperative for healthy sperm parameters. However, the semen analysis of those who smoke shows a noticeable dip in semen volume. The experts speculate that it is due to the poor performance of the prostate and other seminal glands.

What Are The Effects Of Smoking On Male Reproductive System?

Semen analysis parameters alone often do not lead to complete infertility. They may delay pregnancy until you improve your fertility levels (subfertility), but severe infertility has other reproductive abnormalities in conjunction.

Tobacco smoking alters reproductive health through hormonal and other changes.

  1. Tobacco smoking damages the lining of the epididymis — a tubular structure where sperm mature and develop tails. The researchers have found tufts of detached cilia (hair-like structures) in the epididymis of smokers. It points towards the possibility of damage to sperm maturation because, without cilia, sperm cannot reach the epididymus.

Does Vaping Or Chewing Tobacco Have the Same Results?

Vaping and chewing tobacco are two different things.

Chewing tobacco eliminates the smoke and inhalation part of tobacco smoking. It also means that tobacco gets metabolized in your liver before reaching any other part of your body through blood. This method reduces the available amount of tobacco to blood but does have an impact on fertility.

The vehicle might be different, but the passengers are the same. The semen analyses of tobacco chewers show compromised sperm health because toxic chemicals still make their way to your blood.

Vaping eliminates tobacco from smoking and only keeps the nicotine part of it. As nicotine is the only addicting substance in cigarettes, vaping caters to dependence without the extra baggage. The research studies about vaping and its influence on male fertility are largely inconsistent. More evidence is needed to establish a definitive conclusion, but experts advise against vaping to protect fertility.

You may speculate that eliminating tobacco chemicals should solve the problem. However, nicotine itself is also harmful. It metabolizes as cotinine in the body — a chemical substance known to cause abnormal sperm structure and motility.

What Is The Verdict About Passive Smoking?

Passive smoking is equally bad for male fertility. A survey shows that semen analysis testing of passive smokers shows poor sperm health in at least 50% of the population. While passive smoking, you inhale toxic smoke without nicotine. Since cigarette smoke is a critical player in the low-quality sperm parameters, the consequences are understandable.

How Many Cigarettes Are Enough To Cause Male Fertility Problems?

Some studies show that those who smoke more than 20 cigarettes per day are highly likely to experience detrimental outcomes. However, experts agree that even mild smoking (less than ten cigarettes) proves damaging for semen analysis parameters.

One thing is clear, though. The severity of damage is directly related to the intensity of smoking. The more you smoke, the lower the fertility levels. So, even if quitting abruptly seems unrealistic, it is always a good idea to at least cut back for damage control.

How Long Does It Take To Recover The Damage After Quitting?

It takes at least three months, after quitting, for sperm to regain their strength. Once they mature, there is no rehabilitation strategy.

Three months is the time new sperm production and maturation take.

Some Tips For Quitting Smoking While Trying To Conceive

The estimates show that 15% of men in America indulge in tobacco smoking. It refers to at least 34 million adults with the highest prevalence in child-bearing age. These facts prove that smoking contributes to a large proportion of the male infertility burden.

  1. Being aware of smoking and its influence on sperm health is the first step towards quitting. You realize the problem and can design a solution for yourself.

This information is not intended or implied to be a substitute for professional medical advice, diagnosis or treatment. Dadi Inc. makes no representation and assumes no responsibility for the accuracy of information contained herein, and such information is subject to change without notice. You are encouraged to confirm any information obtained from or through this web site or article with other sources, and review all information regarding any medical condition or treatment with your physician.


  1. Harlev A, Agarwal A, Gunes SO, Shetty A, du Plessis SS. Smoking and Male Infertility: An Evidence-Based Review. World J Mens Health. 2015 Dec;33(3):143–160.

Dadi is the leading male fertility company that makes male fertility testing and storage more affordable and accessible.

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