Seasonal variations influenced the semen quality of the sperm donor in Beijing area

To investigate the change trends of sperm quality with seasonal variations among the volunteers of sperm donors in Beijing area, as well as the relationship between two parameters. Semen data from the volunteers of sperm donors in Human Sperm Bank of Peking University Third Hospital were collected using a retrospective study method. The subjects were divided into 4 seasonal groups based on the lunar solar terms and the time of sperm donation. The data were assessed to find whether there were differences in semen parameters among different seasonal groups, and to analyze the change trends and the influence of seasonal factors on semen parameters. A total of 21 174 semen parameter data were analyzed. Firstly, to analyze all data as a whole, in spring, summer, autumn and winter groups, sperm concentration was (106.04±59.67)×10 /mL, (97.61±47.41)×10 /mL, (100.18±47.17)×10 /mL, (100.59±38.68)×10 /mL, respectively, and the spring group was significantly higher than the other 3 seasonal groups ( < 0.001); proportion