An inquiry by the Women and Equalities Committee on abortion, has said the absence of devolution does not absolve the British government of their obligations on the rights of women living in Northern Ireland.
The committee of MPs launched the inquiry into the lack of abortion reform in the North in September 2018.
Amnesty International and the Family Planning Association have welcomed the report, published by the committee on Thursday, and called on Westminster to take immediate action.
Grainne Teggart, of Amnesty said it was a "welcome and urgent intervention that the UK Government cannot ignore".
"The Committee has made clear that the Government is responsible for delivering urgently needed change on abortion and calls for a timeline and framework to be set out", she said.
"This must include addressing the human rights breaches found previously by a UN Committee, and their recommendations to decriminalise abortion.
"Devolution does not relieve the UK Government of their obligation to protect and promote the rights of women in Northern Ireland."
However, Dawn McAvoy of the group Both Lives Matter said most people in Northern Ireland do not want Westminster to "interfere when it comes to abortion law".
"On the face of it, the recommended changes appear to be limited, but there is no guarantee that any resulting legislation would not be extended to provide abortion access, far beyond these recommendations.
"Rather than impose unwelcome and unwanted legislation on Northern Ireland, we call on politicians to invest in improving service provision to enable all pregnant woman to make good decisions for all lives involved", she added.
