China's surplus of unmarriageable men poses a stark dilemma for Xi and other leaders as they set the country's economic course for the next five years.
Involuntary bachelors, who fail to add fruit to their family tree are often referred to as "bare branches". And the Chinese state has recently started to worry about them.
New research explains why habitat loss means male willow warblers now outnumber females – and that's bad news for the species.
The risk of harm in sex selection stems from the fact that parents don't desire any child, they want a child of a particular sex, who is to remain within the limits of binary gender roles.