National's Health Spokesperson, Shane Rei, says his party cannot commit to adopting Labour's free cervical smear policy if elected, without first seeing the costings and impact it will have on labs.

On Tuesday morning Labour announced it would make cervical screening free for 25-to-69 year olds, if they're re-elected.

National's health spokesperson, Dr. Shane Reti, told Charlie Dreaver the policy is too light on detail for his party to decide whether to back it.