Aim: to study the effect of increased maternal BMI on fetal outcome. Materials and methods: The present descriptive cross-sectional study entitled was conducted in the Department of Obstetrics and Gynecology, Darbhanga Medical College and Hospital, Laheriasarai, Darbhanga, Bihar, India. The study includes 120 subjects who have taken antenatal care at the hospital. Descriptive statistics included computation of percentages, means and standard deviations were calculated using SPSS version 20. Results: mean age was 28.21 years, mean BMI (kg/m2 ) was 28.49 and mean weight gain (Kgs.) was 8.01. Most common neonatal complication was Low Birth Weight (6.7%) followed by Meconium Aspiration Syndrome (5.8%), Sepsis (5.0%), VLBW (4.2%), Hypoglycemia (1.7%), Respiratory Distress Syndrome (2.5%), Congenital Heart Defect (0.8%) and cleft palate (1.7%) respectively. Neonatal death was observed among 6.7% subjects and still birth was reported among 10%. Conclusion: The current study found a link between maternal obesity and newborn problems such as low birth weight, meconium aspiration syndrome, and sepsis.