John Madigan.

John Madigan. Photo: Andrew Meares

DLP senator John Madigan will introduce a private member's bill on Wednesday seeking to remove Medicare funding for abortions ''procured on the basis of gender selection''.

Senator Madigan, who could hold a balance-of-power vote in the Senate after the September election, told Fairfax Media he would ''seek support from other politicians who are on the record as being pro-life''.

Senator Madigan said he had ''seen data that abortion on the basis of gender selection is happening overseas and that means it is likely to be happening here'' although he conceded it was ''difficult to get Australian data'' on the issue.

Senator Madigan would need the support of the major parties for his bill to be brought to a vote, or even to be fully debated. But the Victorian senator has said he is determined to air his strong pro-life views.

''For those of us who for decades have fought for justice for the unborn it galls me to watch political candidates strut around seeking votes from pro-life groups only to hear their entourage proclaiming platitudes such as 'just wait until so-and-so gets in. They're staying quiet now but when they are in they'll sort things out','' he said in a speech last week to The Sydney Institute.

''Then the aptly named 'so-and-so' is elected and the excuses start … To those politicians I reserve my utmost disgust,'' he said.

Senator Madigan said he would raise his private member's bill with Tony Abbott ''but in the first instance it is an issue for the Senate''.

A spokesman for Health Minister Tanya Plibersek said abortion laws were determined by the states.