abstract:In India, the Child Sex Ratio is defined as the number of females per thousand males in the age group 0–6 years in a human population. Thus it is equal to 1000 x the reciprocal of the sex ratio (ratio of males to females in a population) in the same age group, i.
And when the NSS does produce figures comparable to the census, they closely match it (for example, the NSS and census figures for the childsexratio in 2001 and 2011 are almost identical).