Does Dad's smoking harm fertility? new study investigates

NCT ID NCT02803658

Terminated Knowledge-focused Sponsor: Centre Hospitalier Universitaire, Amiens Source: ClinicalTrials.gov ↗

First seen Jun 27, 2026 · Last updated Jun 27, 2026

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.

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.

This is an AI summary of the original study and may miss details. Read our disclaimer.

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Conditions

The condition(s) this trial relates to.

infertility disorder Smoking

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

INFERTILITY

Contacts and locations

Locations

CHU Amiens

Amiens, 80054, France
CHU Caen

Caen, 14033, France

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