Your sperm quality may fluctuate over shorter or longer periods of time


Your sperm quality may fluctuate over shorter or longer periods of time. This is normal. The quality of semen is also different from man to man. If you are unsure of  the quality of your sperm, you can get a sperm count analysis.

Long-term illness may cause low sperm count as the sperm can deteriorate severely and in some cases, it can cause sterility. Therefore, it can be a good idea to store your sperm in a sperm deposit before starting e.g. chemotherapy.

Even if you are fit and healthy, there are many things that can cause low sperm count:

Fever is a key determinant of whether you have good semen quality. If you have had a fever it can have a big impact on your sperm quality for up to three months, because that is how long it takes for sperm cells to form and mature.

Sperm cells are sensitive to heat and cannot survive very long at high temperatures. Although the body has compensatory mechanisms such as sweating and adjustment of the scrotum, the following should be avoided:
– Long stays in a sauna
– Long, hot baths
– Use of tanning booths and excessive sunbathing
– Tight pants

Although it is possible for men to have children at an older age, sperm count, volume and motility reduces with age.

Too much coffee, alcohol and cola can lead to reduced sperm quality.

Anabolic steroids and other use of hormones can lead to reduced sperm quality. However, the body also experiences natural hormonal changes, which may cause natural fluctuations in sperm quality.

Tobacco smoking – both cigarettes and stronger tobaccos – can reduce sperm quality.

Other facts
Besides the above, your sperm quality may be affected by for example obesity, drug abuse, lack of exercise, excessive exercise, stress and lack of sleep.

Learn more about sperm count

You are always welcome to email or call us if you have any questions.

Phone: +45 88 77 17 57

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European Sperm Bank is located in Copenhagen, Lyngby and Aarhus.


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Take the first step to become a sperm donor at European Sperm Bank. Fill in the application form and we will get in touch. Click the apply button:

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If you are between the age of 18 and 40, healthy and want to help childless women and couples, you can be a sperm donor. Learn more about the application process here:

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You are always welcome to visit us at our offices. European Sperm Bank have three offices in Denmark: In central Copenhagen (Nørrebro), in Lyngby and in Aarhus.

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We make a difference for those, who cannot have children on their own. At European Sperm Bank, we specialise in the collecting, handling and the distributing of donor sperm.

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