American researchers have found that changes in the quality of men's semen may be related to the season. Dr. Grace Saintola and Shirley Eberley of the University of Rochester in New York analyzed the semen of infertile men over a period of 32 months. The results showed that sperm with malformed heads were more common in autumn than in spring. This is because in the hot summer, the temperature of the scrotum is high, so in the autumn, this abnormal sperm is released from the semen. The increase in sperm head defects may be related to an increase in scrotal temperature.
The proportion of immature sperm in summer is higher than in other seasons, which is due to the hot weather. However, winter can easily cause defects in the sperm tail of men. Saintola and Eberley pointed out that spring is the season with the highest frequency of sperm tail defects. Sperm with tail defects have poor motility, making it difficult to reach the egg and fertilize it. In general, the highest sperm count occurs in winter, followed by spring; The strongest sperm activity occurs in autumn and winter.