Family Planning national medical officer Dr Christine Roke said subsidies for long-term contraceptives was likely a big factor in the decline.
"These things have got more than one reason and one of the things is the increased use of long-term contraceptives," Dr Roke said. Women were increasingly seeing those kind of contraceptives as a better option, Dr Roke said. That was because many young women now understood it would not impact their ability to become pregnant in the future.
While contraceptive pills only worked about 91 per cent of the time, long-term contraceptives worked about 99 per cent of the time, Dr Roke said.
There was also better sex education in schools and less social stigma around unplanned pregnancies, Dr Roke said.
Voice For Life administrator/treasurer Steve Jaunay, based in Whangarei, said access to ultrasound scans and other technologies was generating a better awareness of the reality of abortion.
While the number of abortions overall had decreased, each life was important, Mr Jaunay said.
"Each pregnancy represents a potential life that we are given the responsibility to care and protect," he said.
"We have as a nation, and globally, failed to protect our most vulnerable citizens."
Of the abortions performed last year on Northland women, 83 were aged under 20 years old, 140 aged 20-24, 95 aged 25-29, 55 aged 30-34, 40 aged 35-39 and 18 were over 40.