Bay of Plenty midwives who took part in the first of two weeks' of strikes were not manning picket lines but providing life-preserving services instead.
More than 100 midwives employed by the Bay of Plenty and Lakes district health boards took part in the nationwide strikes which began yesterday and will continue for two weeks in two-hour work stoppages.
Midwifery Employee Representation and Advisory Service co-leader (midwifery) Caroline Conroy said midwives who were rostered on were still at work during the strikes providing life-preserving services.
Conroy said the strikes would not have gone ahead if women and their babies had been compromised.
"But the fact that some DHBs have requested more midwives than would normally be rostered on duty highlights the severe under-staffing in maternity units around the country."