Two-Way Movement of Sex Ratio Swapan Seth The female-male ratio in the total population has long been low in India since the beginning of this century and it is declining steadily, ft could suggest, apparently, to hold the idea that the low sex ratio may be prevalent in all the age groups also. But it is revealed that among the marriageable adults sex ratio has been high. A comparison among population data of India, France and Switzerland visualises a demographic paradox.