sex ratios

Gender Imbalances: Missing Girls and Vanishing Men

Certain factors contributing to gender imbalances in some populations have resulted in “missing girls,” like in Vietnam, above, and “disappearing men,” like in Russia. The Covid-19 pandemic will have enduring effects on the imbalances as well.
Normally, the numbers of males and females in a human population are about the same across all such populations. However, pregnancy interventions by couples and unhealthy lifestyles among young men have produced gender imbalances, giving rise to “missing girls” in some populations and “disappearing men” in others.