Plunket's 1000 Days to Raise a Bundle campaign is monitoring the progress of two Hawke's Bay babies born at the end of September, with 20 other families from around the country.
It aims to raise awareness of the vital role the charity plays in the first 1000 days of a child's life.
Plunket chief executive, Amanda Malu said it was an ambitious national fundraising campaign, and had received a positive response.
"Plunket is privileged to be welcomed into the homes of 90 per cent of all children born in New Zealand and with its rich history and proven connections within communities, is perfectly placed to help in these pivotal first 1000 days.
"Most people know Plunket for our Plunket nurses, but we also offer a huge range of community support, whether it be parenting education support or bringing mums and families in the community together."