Tory MP Julian Brazier, who leads an informal group of pro-adoption MPs, got year-end health figures from the House of Commons library showing some councils put as few as 1% of their looked-after children up for adoption.
He said the government should 'in extremis consider taking away adoption from the worst offending authorities'.
The ADSS has been gathering its own statistics directly from social services departments, which seemed as they were being collated this week to contradict Mr Brazier's figures.
'If it proves that the figures were flawed then from the point of view of public information we will want to set the record straight.'
Mr Davies said social services departments were committed to putting children up for adoption if it was right for them, and 'headline-grabbing statements' did not help those children.