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UNFPA has been falsely accused by anti-family planning groups of providing support for government programs which have promoted forced-abortions and coercive sterilizations. Controversies regarding these claims have resulted in a sometimes shaky relationship between the organization and three presidential administrations, that of Ronald Reagan, George H. W. Bush and George W. Bush, withholding funding from the UNFPA.  

What groups have made these accusations against UNFPA?
anti-family planning groups