One Child Policy

The one child policy was introduced in 1978 to alleviate social issues due to overpopulation.  The policy is claimed to have prevented 400,000,000 births since its implementation.
The policy is considered to be a factor in china's gender imbalances due to abortions, infanticide, and abamdonment.  a survey reports that 76% of the population supports the policy.
The policy seems to have been enacted with good intentions, but the enforcement of the law is problematic, because ethical enforcement seems impossible.  To enforce the policy one would have to either take second and subsequent children from families or prevent their birth, through means of forced abortion, sterilization, or some kind of widespread birth control.
Many people believe the policy to have lead to extremely unethical practices in attempted enforcement.

one child policy - jìhuà shēngyù zhèngcè (计划生育政策)
baby - wa2wa
abortion - duo4tai1