Background: The problems relating to the management of obesity in pregnancy are many. There are both short-and long-term complications and implications for both mother and fetus. Objectives: To examine pregnancy outcomes in overweight and obese women. Patients and Methods: In this study, one hundred twenty (120) pregnant women were included. They were divided into 3 equal groups: Group A: Pregnant women with normal weight (BMI =18.5 – 24.9 kg /m2), group B: Pregnant overweight women (BMI = 25 – 29.9 kg /m2), and group C: Pregnant obese women (BMI = ≥ 30 kg /m2) to evaluate the impact of body mass index on maternal and neonatal outcomes regarding the incidence of gestational diabetes mellitus, gestational hypertension, deep venous thrombosis, birth weight, route and time of delivery, Apgar score at 1, 5 minutes, neonatal admission to NICU, post-partum haemorrhage, wound sepsis and puerperal sepsis. Results: Correlation between BMI in various groups as regards postpartum hemorrhage, puerperal sepsis and parity showed no statistical significant difference. There were statistical differences between BMI and occurrence of gestational DM, gestational hypertension, DVT, macrosomia, Apgar score at 1min & 5min, wound sepsis, mode and time of delivery. Conclusion: There were strong associations with antenatal complications including increased incidence of gestational hypertension, gestational diabetes and delivery complications, while underweight women appeared to have better pregnancy outcomes than even women with BMI within the normal range. Moderate overweight has a significant deleterious effect on the outcome of pregnancy, and obesity leading to major maternal and fetal complications.