New Delhi: India needs to take urgent action following a sharp fall in its child sex ratio, a United Nations report said on Tuesday.

The study named "Sex Ratios and Gender-Biased Sex Selection: History, Debate and Future Directions", says the child sex ratio in India has deteriorated from 976 girls to 1,000 boys in 1961, to 927 girls in 2001 and to 918 girls in 2011. The report has been constituted by the United Nations Women with support from the United Nations Population Fund (UNFPA).