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Sex ratio

Slightly more males are born in the world than females. But because male mortality is usually greater, in old age groups there are many more women than men. Sex ratio is the proportion of males in the population and indicates the importance of sexual reproduction, the mating system, and capacity for reproduction.

Sex ratio

Slightly more males are born in the world than females. But because male mortality is usually greater, in old age groups there are many more women than men. Across the world there are differences in the sex ratio at different life stages. This imbalance in the male and female population can in some.