Page URL:

Sperm quality is seasonal, suggests study

22 October 2018
Appeared in BioNews 972

Men produce the higher quality sperm in autumn and spring, according to a large study in the USA. 

After analysing sperm samples from 29,000 men given over 17 years, the researchers found that the strongest sperm was produced in spring. The peak for the greatest number of normally shaped sperm was in the autumn. 

The study's lead author Dr Taraneh Nazem, from Icahn School of Medicine in Mount Sinai, New York said: 'It is possible that male fertility is better in these seasons but further research is needed to know how these findings affect pregnancy success rates.'

The researchers believe that sperm quality could be lower at Christmas and during the summer holiday season as men are more likely to drink more and exercise less. They also suggest that the milder temperatures of spring and autumn could also help sperm stay cooler and avoid damage.  

Dr Nazem suggested that men should try to maintain consistent diet and exercise habits throughout the year.

The research, which was presented at the American Society for Reproductive Medicine conference in Denver, Colorado, is the largest retrospective study of sperm quality to date.

In the spring men had an average of 117 million moving sperm per millilitre, a significant increase from 112 million in the summer. The analysis also showed that the number of normally-shaped sperm was highest in the autumn.

Professor Allan Pacey, an andrology researcher at the University of Sheffield, said: 'This is certainly the biggest study I am aware of, and confirms that sperm quality is at its worst in the summer months. It might make a small difference to the chances of pregnancy, although more research is needed.'

Male fertility is 'at its best in spring and autumn' with 117m sperm per mililitre
The Sun |  13 October 2018
Men may be more fertile in spring and autumn because sperm is 'seasonal'
The Telegraph |  13 October 2018
Milder months help sperm to spring into action
The Times |  13 October 2018
6 January 2020 - by Dr Katie Howe 
Diet can influence sperm quality after just a few weeks according to a small study from Sweden's Linkoping University...
14 October 2019 - by Jen Willows 
A new study has shown that sperm quality – but not quantity – may be improved by an antioxidant related to the red pigment in tomatoes...
26 June 2019 - by Shaoni Bhattacharya 
The chance of success with fertility treatment using IVF or ICSI decreases if a man is over 51, according to a new study...
23 July 2018 - by Eleanor Taylor 
The time at which a sperm sample is produced may influence its quality, according to a new study...
29 April 2013 - by Chris Baldacci 
A study conducted by the University of Southern Denmark has found evidence that suggests men who do not get enough sleep are likely to be less fertile....
18 March 2013 - by Simon Hazelwood-Smith 
Human semen quality may rise and fall in seasonal variation, with the best quality being produced in the winter and spring...
20 September 2010 - by Gozde Zorlu 
Higher fertilisation rates have been found in women undergoing IVF in spring, according to new research presented at the World Congress of Fertility and Sterility last week...
to add a Comment.

By posting a comment you agree to abide by the BioNews terms and conditions

Syndicate this story - click here to enquire about using this story.