Obesity induces metabolic dysfunctions in bodily systems and is a significant health challenge. Excessive adipose tissue accumulation encompasses dynamic, endocrine, and biologically active processes. The fundamental pathogenic mechanism of obesity is chronic low-grade inflammation exacerbated by pro-inflammatory biomarkers such as free fatty acids, lipopolysaccharides, adipokines, and cytokines. The rising prevalence of obesity over the past forty years has led to an increase in associated comorbidities, including polycystic ovarian syndrome (PCOS). To clarify the impact of increasing body mass index (BMI) in PCOS and non PCOS on the ICSI outcomes of 143 infertile Iraqi females, dividing them into two main groups: PCOS and non PCOS and each group into normal weight and overweight/obese group. Group 1= normal BMI PCOS, group 2= overweight/ obese PCOS, group 3= normal BMI non PCOS, group 4= overweight/obese non PCOS. Significant differences in ICSI outcomes were observed in the PCOS groups compared to the non-PCOS groups concerning the total number of harvested, MI, MII oocytes, GV, abnormal and fertilised oocytes, total and D3 grade I embryos alongside higher number of arrested and transplanted embryos. There are numerically higher number of D3 grade II and III embryos, morula and blastocyst with no significant difference seen. The rates of maturation and fertilisation exhibited no significant disparities. The biochemical pregnancy rate was higher in group 2 compared to group 1, and in group 4 compared to group 3, with a statistically significant difference. A higher BMI among younger PCOS individuals may be associated with better pregnancy outcomes.