Jim Wallace, Executive Chairman of the Australian Christian Lobby, is urging Christians to pray for a miracle as debate on the abortion pill RU486 continues in the House of Representatives this week.

"Unfortunately the numbers aren't with us at this point," he says, "But there has been more movement to our side than I expected."

Mr Wallace remains hopeful that an amendment by Penrith-based MP Jackie Kelly, that would give parliament final say over RU486, will be successful.

Mr Wallace says Christians should not give up on prayer, despite the numbers.

"We recently saw an impossible situation in Tasmania over brothel legislation turned around due to prayer. We should never give up on prayer," he says.

Christians should also feel optimistic that pro-life arguments are prevailing in Australia, Mr Wallace says.

"I personally believe the current debate is motivated by extreme feminists who saw the ground was shifting against abortion, especially against late term abortions."

"They saw this and brought forward the RU486 issue to break the momentum," he says.

"That's unfortunate. But like the slavery issue in Wilberforce's time, this campaign will take time. But the public mood is changing."

Mr Wallace says that parliamentarians will take note of polls that show nearly three quarters of Australians believe the rate of abortion is too high.

"It seems inevitable that the ethical and social issues concerning RU486 will not go away. Such strong reactions amongst the community and particularly amongst the Church will ensure the vote in the House of Representatives will have very close scrutiny," he says.