Background: Janani Suraksha Yojana (JSY) is being implemented with the objective of reducing maternal and neonatal mortality by promoting institutional deliveries. Aim: The present study was done to see the impact of JSY on the birth weight.Settings: Retrospective observational study conducted at a tertiary care hospital. Methodology: The information related to all the deliveries at the centre two years before and two years after the launch of JSY (i.e. from 2003 to 2006) was collected and analysed.Appropriate statistical tests were applied for the test of significance. Results: There is a significant decrease in the percentage of low birth weight (LBW) babies from 44.50% in 2003–04 (before the launch of JSY) to 40.10% in 2005–06 (after the launch of JSY) (p value <0.001). Conclusion: There is a significant decrease in the birth of LBW babies after the launch of JSY.