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Can Hot Tub Use Affect Male Fertility?

Heat on its own is damaging to the sperm and can hence affect male fertility to a certain extent. This impact is however temporary and does not cause permanent damage. Remember that men’s testes are outside the body for a reason. The reason being they need to be in a cooler environment to produce healthy sperm. Studies have also shown that sperm quality and count vary in men according to the seasons of the year, with the lowest count in summer.

Hot tubs, bicycling and saunas — even wearing tight underwear — are probably okay in moderation, but a man with a marginal sperm count might want to pass on these activities while he’s trying to conceive since the heat generated during these activities can damage sperm.

The quality of sperm is more affected by heat than the quantity of sperm, both of which are linked to fertility and getting pregnant. Men should avoid frequent use of the hot tub when trying to conceive because the testes are very sensitive to heat, which can damage sperm production. The heat can damage developing sperm which may not be fully mature for several months. Sperm count generally returns to normal level within a week of hot tub exposure.

The damage caused to sperm because of heat also depends upon factors like how hot the water is or how long you stay in the hot water or if the man is involved in any other activities that may affect fertility. Jobs which are performed in the heat can also affect the sperm quality. Combining hot tubs, bicycling, and active outdoor jobs and all combine to create lower than average sperm.


Last modified: February 10, 2013


The information provided here should not be considered medical advice. It is based on the average experience of women trying to conceive and may not be what you may be experiencing. It's not meant to be a replacement for any advice you may receive from your doctor. If you have any concerns about your cycle or our ability to get pregnant, we advise you to contact your doctor.