Sperm counts halved in sons of smoking dads

Sperm counts halved in sons of smoking dads

According to a study in Sweden, the sperm count of boys who have fathers that smoked while their mothers were pregnant can have a detrimental effect.

The impact of maternal smoking on the male foetus’ sperm count has repeatedly been shown, however this is the first study that has shown strong conclusive evidence that fathers smoking causes a lower sperm count in sons.

Published in PLOS One, the research strongly suggests that a father’s smoking habit during pregnancy may in fact be more damaging to the son’s sperm count than the mother’s smoking.

The research team found that men of smoking fathers had 41% lower sperm concentration and 51% lower total sperm count than the men of non-smoking fathers.

When looking at starting a family, Fertility First recognises that paternal health is equally as important as maternal health, which is why we offer services such as sperm DNA fragmentation testing and HBA for our male patients. Fertility First provides professional advice on how to improve fertility and sperm health to help give you the best chance of achieving a healthy pregnancy.

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FAQs about improving natural fertility

Will stress affect my ability to get pregnant?

Yes, chronic stress can impact fertility by disrupting hormonal balance and ovulation patterns. Managing stress through relaxation techniques, regular exercise, adequate sleep, and mindfulness practices may help optimise your chances of conception. Consider speaking with a counsellor if stress feels overwhelming.

How does my partner's health affect our fertility?

Sperm health accounts for about 40% of conception challenges. Your partner can improve sperm health by maintaining a healthy weight, avoiding excessive heat exposure (hot tubs, saunas, tight clothing), limiting alcohol, quitting smoking, managing stress, and taking a multivitamin with antioxidants. Sperm takes about 3 months to develop, so lifestyle changes need time to show results.

When during my cycle am I most fertile?

Your fertile window typically spans 5-6 days, ending on ovulation day. For a regular 28-day cycle, this usually falls between days 10-15, with peak fertility 1-2 days before ovulation. Track your cycle using ovulation predictor kits, basal body temperature, or cervical mucus changes to identify your unique pattern. Having intercourse every 1-2 days during this window optimises your chances.