Seasonal influence on sperm quality: spring possibly beneficial

A Vietnamese news site suggests that sperm quality may depend on the season. According to the source, there is a period of the year when sperm quality is at its best. Which season this is exactly is not clearly stated, but earlier studies from other countries sometimes point to spring.
The source does not provide further explanation on how significant the difference is or which factors may play a role. Possible influences, such as temperature, sunlight or lifestyle factors, remain undiscussed. Whether the report is based on scientific research or general observations is not clear.
The idea that sperm quality varies with the seasons is not new. Some studies suggest that sperm cells may be more active or numerous in certain months. However, whether this also applies to men in the Netherlands or other temperate climates remains to be seen.
This report is a summary based on the mentioned source and is not medical advice. Consult a doctor or pharmacist in case of complaints.