Body & Exercise · 1 min
Smoking, why it matters, and what stopping actually does
Top things to know
Smokers have around 13–17% lower sperm count on average, with more sperm DNA damage.
Vaping, chewing tobacco, and gutka carry their own fertility risks; the harm is not only from smoke.
Sperm count recovers substantially within 6 months of quitting; DNA quality keeps improving after that.
Using a stop-smoking service doubles or triples the chance of quitting compared to going it alone.
What does smoking do to sperm quality?
Tobacco smoking is one of the most consistently-proven male fertility risks. A systematic review and meta-analysis (Sharma et al 2016, European Urology) showed smokers have around 13–17% lower sperm count on average, worse motility, and higher sperm . also declines over time with sustained smoking.
Vaping is newer and less studied, but early evidence suggests a smaller but measurable similar pattern. Chewing tobacco and gutka, common in parts of the South Asian diaspora, carry their own male-fertility risk alongside the well-known oral-cancer risk.
13–17%
Smokers have around 13 to 17% lower sperm count on average, worse motility, and higher sperm DNA fragmentation.
Sharma et al, European Urology, 2016
What happens to sperm quality after you quit smoking?
Sperm production takes around 74 days, so changes after quitting are seen within 3 months. Sperm count typically recovers substantially within 6 months; DNA quality keeps improving beyond that.
If an cycle is coming, stopping smoking 3 months before egg collection has a measurable effect on outcomes, reducing means healthier embryos at the point it counts.
How do you get help to quit smoking?
Using the service doubles or triples the chance of successfully quitting compared to going it alone. It is not weakness, it is using the tool that works.
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Reviewed by clinicians
Authored and reviewed by clinicians from the founding team. Information only, not personalised medical advice.
From the team behind Her Holistic Health, founded by Dr Divpreet Sacha, NHS-trained GP.