Waverley-raised lance corporal Hana Wainohu hopes her example will show other mothers they can continue playing sport after having children.
Wainohu, 23, is a halfback for the New Zealand Defence Force (NZDF) Ferns team and is set to compete in the first women's International Defence rugby competition.
She'll be playing with her 8-month-old daughter Waimarie on the sideline.
"The NZDF is willing to support and assist us as mothers to continue to represent them in our sporting codes," Wainohu said.
"The greater message here is to show women that we can continue playing sport while being mothers with the right assistance and support."