National has promised to extend paid parental leave from 18 weeks to 22 weeks, although the extension would be phased in over two years from July next year.
It would also allow greater flexibility so that both parents could take some of the 22 weeks at the same time to both be at home with the baby.
In two other promises, National would fund families using IVF to have a third cycle free and would give expectant mothers a free dental course up to the baby's first birthday.
Women's Affairs Minister Paula Bennett, Workplace Relations Minister Michael Woodhouse and Health Minister Jonathan Coleman made the announcement this morning.
Bennett said the package recognised the role of both parents and would allow families to have the flexibility that suited their circumstances.