Background: The sex ratio at birth and the sex ratio in the population should remain constant without manipulation. However, several parts of the world, particularly some Asian countries including India, have shown a low sex ratio at birth due to the preference for a son and due to sex selective abortion.

Objectives: The objectives of our study were, to find out the trend of sex ratio at birth in institutional deliveries.

Methods: In the present study, the secondary sex ratio was analyzed from the birth records of all the deliveries which were conducted at the College of Medicine and JNM Hospital, WBUHS, Kalyani, Nadia during the period from January 2016 to September 2017.

Results: During the study period, 12,852 institutional deliveries took place, of which 6017 was female births, thus giving an overall sex ratio of 880.

Conclusion: In our study, a trend towards an alarmingly decreasing sex ratio was documented.

Key words: demographic indicator, literacy rate, sex composition

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