The US has withdrawn funding for the United Nations Population Fund (UNFPA), an agency that promotes family planning in more than 150 countries, according to BBC.
The state department said the UNFPA "supports or participates in the management of a program of coercive abortion or involuntary sterilisation".
This is the first of the promised cuts to US financial contributions to the UN by the Trump administration.
The UNFPA said it "regrets the decision" and had not broken any laws.
In total $32.5m (£26m) in funds is being withdrawn for the 2017 financial year.