More than 1100 DHB-employed midwives have voted overwhelmingly to reject the DHBs' pay offer and go on strike.
Eighty per cent of midwives' union MERAS members employed by all 20 DHBs cast their votes.
Of these, 90 per cent voted to reject the DHBs' offer and to take strike action.
Midwives will be giving notice from tomorrow of two-hour work stoppages every day on every shift over a two-week period - effective November 22 to December 5.
MERAS industrial co-leader Jill Ovens said they wanted to maximise disruption for the DHBs while minimising the effect on women and their babies. The strike comes after a year of negotiations.
Members have rejected the pay offer from the DHBs because they were refusing to recognise midwives' skills and responsibilities by offering them the same pay scale as nurses, she said.