Background: Birth weight (BW) of infant’s is an important determinant of well‑being. Several factors such as mother’s sociocultural, demographic, education, pre–pregnancy body mass index (BMI), and gestational weight gain contribute to BW.

 Aim: To study the impact of maternal BMI to the BW of their babies

 Methodology: A ‘prospective observational study. Total 120 women, aged 20–40 years, with singleton gestation and uncomplicated pregnancies were consecutively recruited during the antenatal  visit before 8 weeks of gestation and followed till delivery. Relevant socio–demographic data including the BMI and BW of the Neonates were recorded using a structured questionnaire. Data was analyzed using SPSS version 21.

Results: Pregnant females were enrolled in the study with mean age 28.27±4.82 years. Mean BMI at first visit, 25.11+4.35 kg/m². Mean birth weight of babies delivered, 2.50±0.57 kg. There was a significant correlation between maternal BMI at their first visit to the BW of the neonates (P < 0.001).  showing that maternal BMI is directly related to the neonatal BW.

Conclusion:  study shows a significant impact of maternal BMI on BW of the neonates