Does Dad's smoking harm fertility? new study investigates
NCT ID NCT02803658
First seen Jun 16, 2026 · Last updated Jun 22, 2026 · Updated 1 time
Summary
This study looked at how a man's smoking habits might affect a couple's ability to have a baby. Researchers compared fertile and infertile couples, measuring smoking markers like carbon monoxide and cotinine in blood, semen, and hair. The goal was to understand if smoking damages sperm and contributes to infertility, but the study was stopped early, so results are limited.
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Contacts and locations
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Locations
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CHU Amiens
Amiens, 80054, France
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CHU Caen
Caen, 14033, France
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
What this could lead to
If successful, this study could clarify how male smoking impacts fertility, potentially guiding lifestyle advice for couples trying to conceive.
What could go wrong
The study was terminated early with only 154 participants, so results may be incomplete or inconclusive. Observational studies cannot prove cause and effect.
Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.