Background: The prevalence of low birth weight (LBW) in India is found to be 26%. WHO estimates 25 million LBW babies are born each year, nearly 95% of them in developing countries. LBW is a major determinant of neonatal mortality and morbidity. In addition, the number of stillbirths and the incidence of LBW babies were found to increase with decreasing maternal haemoglobin level. Aims & Objectives: Aim of the study was to assess the average birth weight amongst children born in a tertiary hospital and study the factors influencing the birth weight of the child. Methodology: A descriptive study based on secondary data collected from the hospital records of women delivering in the hospital from January to December. Data included mother’s age, mother’s haemoglobin levels, term of delivery, type of delivery, outcome of delivery, sex of the child and birth weight of the child. Results: The ratio of female to male child is 0.93. Approximately 83% (1559) mothers delivered at term while 17% (329) delivered prematurely. Of the 1850 single live births, 347(19%) were underweight. 22% of the female children were underweight as compared to 16% male children. This difference in birth weight between male and female children was statistically significant. The percentage of women with haemoglobin less than 10 gms% delivering a low birth weight baby was 23% as compared to 17% of those with haemoglobin levels 10 gms% or above. Conclusions: The average birth weight of female child is lesser than the male child, which was found to be statistically significant. Women with lower Haemoglobin levels tend to deliver prematurely and therefore give birth to LBW babies. Though there appears to be biological difference between male and female child, focusing on improving the haemoglobin levels especially of those below 10 gms% is likely to increase birth weight of babies.