| Summary: | INTRODUCTION: There are many studies focusing on the effect of environmental conditions on human sperm quality. Therefore, we aimed to evaluate the possible effects of environmental factors such as air temperature and humidity, sun exposure time and particulate matter 10 (PM10), on semen parameters in Diyarbakır. METHODS: In this study, semen analysis data obtained from 7318 men with suspected infertility were analyzed retrospectively. Since spermatogenesis takes more than two months, retrospective data were adjusted to assess environmental exposure three months before semen retrieval. Semen samples taken from the participants were examined in conformity with WHO criteria after liquefaction. RESULTS: The mean age was 30.67+- 7.21 years. The average air temperature was inversely related to sperm concentration, total sperm count, and total progressive motile sperm count (TPMSC). Sperm concentration, total sperm count, and TPMSC increased at low temperature (< 15oC) compared to high temperature (>15oC). TPMSC was higher in sun exposure for less than 8 hours than those exposed for more than 8 hours. Also, sperm concentration, and total sperm count, were higher when above relative humidity 50% than below 50% relative humidity. There was no significant difference between PM10 values (<40 μg/m3 and ˃40 μg/m3) and sperm parameters. DISCUSSION AND CONCLUSION: Our results supported that environmental factors such as sun exposure, relative humidity and air temperature negatively affect sperm parameters
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