She hoped her breastfeeding in the House would help send a message to other parents.
"Parliament is trying to accommodate me and other parents, so we don't have to choose between careers and families. I see it as role-modelling and setting an example."
Prime, a Northland-based list MP who entered Parliament after September's election, said it made a difference to have her daughter with her. Her husband and mother have also been at Parliament when possible, to help.
"It means I can actually do this job. And also have a family - raise a family. And at this important time in my baby's life it means I can be there for her, to provide her with what she needs. But also to be here representing my communities in the House of Representatives.
"[In] many families, both parents are working. I'm so pleased that tonight we are going to look at extending paid parental leave. That will make a huge difference to working families."
In May Australian Senator Larissa Waters became the first to breastfeed in Australia's Parliament.