Abstract: It is known that body mass index (BMI) correlate with female fertility; however, little information is available on the effect of BMI on male
fertility or sperm parameters. Therefore, the study objective was to determine the relationship between BMI and sperm parameters. We analysed data on sperm samples from 375 men who were grouped based upon calculated BMI values (normal, 20-24 kg/m2; overweight,25-30 kg/m2; obese, >30 kg/m2). The data collected included patient height and weight, sperm concentration, percent sperm motility, percent of normal sperm morphology, and percent of ejaculate volum. Data were analyzed by Chi-Square and Fisher tests. The overall BMI mean (± SEM) was 27.01 (±4.44) kg/m2. There was no significant correlation between BMI and low sperm concentration (p= .720), low percent sperm motility (p= .051), abnormal percent sperm morphology (p= .368) and percent of low ejaculated volume (p= .180). Keywords: obesity, body mass index, sperm parameter