The birth rate has dropped by more than half since the 1960s - and a mother says economic realities often force the issue.
Statistics New Zealand said yesterday that in the year to September 30, the average woman was mother of 2.1 children, compared with 4.3 in 1961, when the birth rate was at its peak.
Onehunga mother Maree Howcroft grew up in a four-child home and said she had seen it as an ideal number.
"I always wanted four, but we've stopped at three - the economy is probably the reason," she said. "It was really fun growing up in a big family."
She now has three boys - Tom, 6, William, 4, and George, 2.