Summary
A study found that sperm move faster in the summer and slower in the winter. Researchers looked at samples from over 15,000 men in Denmark and Florida. The study suggests that understanding these seasonal changes could help improve fertility treatments.
Key Facts
- Researchers analyzed semen samples from 15,581 men aged 18 to 45.
- Sperm motility, or the ability to swim effectively, was highest in June and July.
- The study included men from Denmark and Florida.
- Sperm motility levels change with the seasons, not just with temperature differences.
- The study found no seasonal change in total sperm concentration or ejaculate volume.
- Optimal testes temperature is 2-4 degrees lower than body temperature.
- The study was published in the journal Reproductive Biology and Endocrinology.
- Professor Allan Pacey highlighted that seasonal variation occurs even in warm climates.
