Due to the gender imbalance, by the year 2020, 24 million Chinese men will be unable to find a spouse.
The gender imbalance among newborns is the most serious demographic problem for the country's population of 1.3 billion, says the academy.
It cites sex-specific abortions as a major factor, due to China's traditional bias towards male children.
The academy says gender selection abortions are "extremely common".
This is especially true in rural areas, and ultra-sound scans, first introduced in the late 1980s, have increased the practice.
|Gender imbalance in china|
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