West Australian Federal Minister Ken Wyatt has played down the prospect of a mass exodus of senior Liberals in the lead-up to this year's election.

Key points: Ken Wyatt said he is staying put, despite the recent resignations of three senior MPs

Ken Wyatt said he is staying put, despite the recent resignations of three senior MPs He is not expecting other colleagues to announce they are not recontesting their seats

He is not expecting other colleagues to announce they are not recontesting their seats He said those who do stand should see out their terms, even if in Opposition

The Aged Care Minister, who holds the marginal seat of Hasluck in Perth's eastern suburbs, said he was "absolutely" committed to contesting the poll.

"I'm not going anywhere," he said.

"I'm in for the long haul. I'm not intending to be in Opposition, but if I end up in Opposition then I'll still put into my work the same rigour and commitment that I give to the people of Hasluck and to Australia and to my party."

Michael Keenan cited family reasons for his decision to leave federal politics. ( ABC News: Madeline Palmer )

Mr Wyatt's WA ministerial colleague and fellow marginal seat holder, Michael Keenan, announced on the weekend that he would quit politics at the next election.

The Human Services Minister has held the seat of Stirling since 2004, but said he could not commit to another term due to the pressures on family life.

Mr Keenan is one of three Federal Government ministers to recently announce their intention to leave Parliament.

The Minister for Jobs and Women, Kelly O'Dwyer, and the Indigenous Affairs Minister Nigel Scullion will also not be recontesting their seats this year.

Ms O'Dwyer said she would not contest the next election for "very personal" reasons. ( ABC News: Nicole Asher )

'When we commit, we should follow through'

Mr Wyatt would not be drawn on speculation about the future of another senior West Australian Liberal, the former foreign affairs Minister Julie Bishop, who holds the safe seat of Curtin.

"I'm not going to comment on Julie because Julie has already indicated that she will be contesting her seat," he said.

He said he did not approve of the idea of resigning after the general election if the Coalition was to lose government.

Christian Porter says he would like to see a female candidate in Stirling. ( ABC News: Matt Roberts )

"All of us, when we commit, should follow through," he said.

Mr Wyatt said he was optimistic about retaining his seat, which was among a clutch of key marginal WA electorates the Coalition must retain to win another term.

The WA Liberal Party is now hunting for a candidate to replace Michael Keenan in Stirling.

The Federal Attorney-General Christian Porter, who holds the marginal WA seat of Pearce, said his party should preselect a woman.

"Stirling is eminently winnable and will be won," he said.

"I'd like to see a great female candidate in the seat, but the party will go through its own processes."

The Liberal Party State Council will meet on Tuesday night to formally open nominations.

WA state director Sam Calabrese said "a number of highly credible and strong potential candidates" had expressed an interest in contesting the seat.