Is There An Association Between Laptops, Heat and Sperm?


laptops, heat and spermWe are often asked if there is anything that we can advise after a vasectomy reversal to boost an individual’s sperm count. Research is increasingly finding that heat has a negative impact on sperm (which is why the testes are located out of the body as sperm need a cooler environment to grow and function).

A recent article in the Times  (October 2013) asked the question as to whether laptops, heat and sperm counts were connected in some way.

There are various pieces of research that have investigated if harm is caused from the radiation:

Research carried out in New York by Dr Yefim Sheynkin [1] found a dangerous rise in the scrotal temperature of men within 15 minutes of starting the experiment. He also identified that WiFi might increase the rise in the temperature of the groin.

Research conducted jointly between Argentina and the United States of America [2] also found an association between laptops, heat and sperm. The experiment looked at  found  semen samples, positioned an inch away from a WiFi attached laptop, to see if there were any changes in health and motility. The results found that the sperm experienced DNA damage and poor mobility compared to normal sperm. The study went on to show that 4 hours of sitting under a wifi connected laptop led to 9 percent having DNA damage and 25 per cent no longer moving.

In addition, research in Chefs has identified that the heat from the ovens heats up the testes and causes a decline in sperm counts. Rates of infertility in Chefs in the UK  is actually double the national average and because of this, they are encourages to wear heatproof shields in their apron pockets to deflect the heat away from their scrotum.

Research has also identified associations between DNA damage of the sperm and heat [3]

Jacuzzis, saunas and the wearing of lycra for cycling combined with the exertion of cycling all increase the heat the the groin area. [4]

Whilst the evidence might appear to be a little scary, the harm caused by laptops, heat and sperm is reversible and if changes are made today, then in around 3 months time, your sperm will be much healthier. This is actionable advise that you can implement today.

If you have any questions about this article, please contact us.


  1. Yefim Sheynkin et al Human Reproduction, Volume 20, Issue 2, 1 February 2005, Pages 452–455,
  2. Conrado Avendaro M.D. et al Fertility & Sterility January 2012 Volume 97, Issue 1, Pages 39–45.e2
  3. Mei-Hua Zhang et al . 2015 May; 32(5): 747–755.
  4. Meng Rao et al . 2015 Jul-Aug; 17(4): 668–675.

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