The country's district health boards are criticising midwives' decision to strike before voting on the latest pay and working conditions offer.
DHB-employed midwives will do eight hour rolling strikes between Monday and Thursday next week, ending in a rally at Parliament.
Notice has also been issued for a 12 hour strike on 19 August.
DHB spokesperson Dale Oliff said the strike action is premature, and their offer is comprehensive and should be considered.
It includes an immediate $6000 salary increase and another $5600 a year after the deal is ratified.