The DUP will oppose any proposal to change the law to allow unmarried and gay couples to adopt children, Jeffrey Donaldson has said.
Earlier this week, Lord Chief Justice Sir Brian Kerr dismissed a bid to overturn the current law banning adoption by unmarried couples.
The Department of Health is considering proposals to change the law to enable unmarried and gay couples to adopt.
But speaking on Inside Politics, Mr Donaldson said the DUP would oppose it.
"It remains my view that a married relationship is the best relationship for adoption," he said.
"The DUP will vigorously oppose any move in Northern Ireland to introduce gay adoption.
"We do not believe it is right that a child should be placed into a gay relationship."