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This book documents the human suffering caused by China's effort to control its population growth. It tells how government policy has encouraged extreme measures, including forced sterilizations and abortions, even when it publicly condemns them. The author offers documentation from Chinese sources. Because of the one-child policy for example, the male-female balance has been threatened, as peasants, fearful of not having a son to support them in old age, kill thier female babies.
Barrett et al. (Tue,) studied this question.