It is illegal for a woman in NI to have an abortion except if her life is at risk.
The number of women travelling from the Republic of Ireland to the UK for abortions has continued to decline.
Figures released by the Crisis Pregnancy Agency show that last year 4,600 women attending abortion clinics in Britain gave an Irish address.
That was 86 fewer than in 2007, and 2,000 fewer than when the agency was established in 2001.
The number of woman from Northern Ireland travelling for an abortion last year also fell.
The number of women from the Irish republic attending abortion clinics in the Netherlands is also declining - 331 last year, compared to 451 in 2007.
At the launch of its annual report, the agency said it wanted to highlight the existence of agencies that seek to manipulate women by providing a "disingenuous" crisis pregnancy counselling information service.