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Abstract To analyze the correlation between body mass index and semen quality of infertile men. Methods: 100 infertile men were selected as subjects from January 2015 to March 2018.According to the difference of body mass index (BMI), the included man were divided into group A (BMI<18.5), group B (18.5<BMI<23.9), group C (24.0<BMI<27.9) and group D (BMI>30.0).All the man were measured the quality parameters of semen. The correlation between the BMI and the quality of semen were analyzed. Results: The level of estradiol (E2) of man in group C or group D was significant higher than that of man in group A or group B, but the level of testosterone (T) were significant lower (P<0.05). The semen volume and total number of sperm of man in group B was highest by analyzing the median and quartile spacing of parameters of semen quality(P<0.05). There was no significant difference in the other parameters of residual semen quality among the four groups (P>0.05). Conclusion: There is a certain correlation between BMI of male body mass index and the quality of semen. When BMI is over 28, the level of T and LH reduce obviously, which can decrease the vitality of sperm.
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