The Green Party wants to make abortion freely available to women up to 20 weeks pregnant.
At present, a woman needs the approval of two certifying consultants. The doctor performing the abortion has to believe it is immediately necessary to save the life of the patient or to prevent serious permanent injury to her physical or mental health, or has to believe the foetus would have a serious disability.
Women's spokeswoman Jan Logie said it was time for New Zealand to take a more honest approach to abortion and treat it as a health issue.
"The fact that 99 per cent of abortions are approved on 'mental health' grounds and that rape is not grounds for an abortion reveals the dishonesty of the current legislation," she said.
"The Green Party trusts women to make decisions that are best for them and their whanau/family."