"In the last year, Plunket received more than 20,000 calls related to breastfeeding alone," Malu said.
"Plunket has a key role in supporting mothers to breastfeed, and we're thrilled to be able to now offer even better support to New Zealand mothers."
Chloe Wright, chief executive of the Wright Family Foundation, said the foundation shared Plunket's vision of providing the best start in life for the children of New Zealand.
"It's great news that Plunket can now introduce follow-up phone calls for mothers that ring in with breastfeeding issues. So often these problems happen in the middle of the night when mum is exhausted and needs to get baby to sleep.
"By having lactation consultants available at night, each mum can get the immediate help she needs to settle her baby, and then the next day she'll get a call back from a lactation consultant to address any other concerns when baby has stopped crying and she's feeling calmer."
Online videos and podcasts offering advice to mothers would also be available.