UPDATED 9am: There's a warning that any move towards a tougher line on contraception shouldn't target certain groups of people.

LISTEN: Director of Centre for Ethics Law and Society at Cardiff University Nicky Priaulx speaks to KPMG Early Edition about Anne Tolley's comments on contraception

Social Development Minister Anne Tolley said an overhaul of Child Youth and Family could include getting faster contraceptive advice to some people, and isn't ruling out even preventing some families from having another child.

Green Party social development spokesperson Jan Logie said it feeds into an undercurrent of thought that has dangerous consequences.

"In the last few years I've been disturbed at the number of people who are just going on quite an aggressive position of saying these people shouldn't be allowed to have children and they are seeing people in these situations as less than human."

Massey University's Deborah Russell said if the state was to tell mothers how many children they can have - its control over our personal bodies - which is the definition of slavery.

She thinks we can't control when people can or cannot have children, because no one has the right to make that judgement.

Russell argues it's about creating the environment where people decide to make good decisions.

Meanwhile, the Government's getting an unusual defender on the issue, in the form of the Labour Party.

Labour leader Andrew Little said more access to contraception is a good thing, and he doesn't see the rest of the minister's remarks as meaning the Government plans to take the scheme any further.

"My own personal assessment of Anne Tolley is that she would be uncomfortable with that level of intervention."