Surrogate mothers in Queensland are protesting against plans to make the process illegal for singles and same-sex couples.

The LNP Government wants to make it illegal for singles, same-sex couples and defactos who have been in a relationship for less than two years to use a surrogate mother.

The proposed changes break a promise made by Premier Campbell Newman just before this year's state election.

Lawyers, surrogate mothers and parents attended an emergency meeting in Brisbane on Wednesday night to start a campaign against the changes.

Family lawyer Stephen Page is one of 10 speakers who addressed one of the community meetings.

He says the changes appear to breach the Universal Declaration of Human Rights and the Federal Sex Discrimination Act.

He says same-sex couples who are denied fertility treatment could appeal.

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"They could then seek a declaration from Queensland or Federal Courts to say that the Queensland legislation is in breach of the Sex Discrimination Act and the Sex Discrimination Act would then override it," he said.

"It just seems to be a completely nonsensical position."

Surrogate mother Rachel Kunde said she was happy to help a gay couple by acting as a surrogate and giving birth the twin boys.

"Having children is an amazing experience and I definitely did want to help someone else experience that," she said.

"When I met Michael and Jared it was obvious they weren't going to be able to have children on their own, so it was an extra incentive for me to help them because there was no way that they could have children without the help of someone like me."

Under the LNP's proposed changes, surrogate mothers like Ms Kunde and the twins' fathers Michael and Jared, could go to jail for up to three years.

Promise a 'mistake'

Just before this year's election, Mr Newman promised there would be no changes to surrogacy laws.

He has apologised for that claim today, saying he made a mistake.

"Over the whole 12-month period of the campaign I never at any stage had had any advice on the matter because it had been dealt with back in 2010," he said.

"Frankly, the mistake was not understanding what my MPs had been discussing."

About five couples have had children through surrogacy using regulated channels since 2010.

Advocacy group Surrogacy Australia says at least another five children were conceived through private agreements and up to 40 through overseas surrogates.

Ms Kunde says if the proposed changes are made, singles and same-sex couples will face the tough question of whether to remain childless or breaking the law.

"If people aren't prepared to move interstate or overseas or whatever to access surrogacy then there's going to be a lot of what you could call 'backyard deals' going on, that offers both parties no legal protection at all," she said.

"So what they're doing is effectively pushing people out of Queensland and pushing people to do illegal acts to become parents."

The State Government says the new laws would not be retrospective, so those who have used surrogacy to become parents since mid-2010 would not be affected.

The new legislation is expected to be introduced to Parliament in a couple of months.