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Abstract Objective：To assess the effects of body mass index（ BMI） on intrauterine insemination with husband sperm.Method：The clinical data of 658 IUI cycles from January 2011 to December 2013 in our hospital were retrospectively analyzed.According to body mass index of females， total cycles were divided into 4 groups：underweight group（ BMI<18.5 kg/m2， n=92）， normal group（ 18.5 kg/m2 ≤ BMI<23.0 kg/m2， n=303） ，overweight group（ 23.0 kg/m2 ≤ BMI<25.0 kg/m2， n=156） and obese group（ BMI ≥ 25.0 kg/m2）.Basis on the situation， treatments and reproductive outcomes were compared among these groups.Result：Although they were less in obese group than the normal weight group.There were no differences in the duration of infertility and average age between the four groups.Compared with the normal weight group， ovulation disorders was significantly elevated in the obese group， the clinical pregnancy rate decreased miscarriage rate， ectopic pregnancy rate and multiple birth rate increased（ P<0.05）， but the difference between groups was not significant.Conclusion：In females obesity may have impaired reproductive outcomes.
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