The woman who gave birth on the side of an Auckland motorway has met with the cop who played midwife, ensuring the safe delivery of her first child.

Shanelle Curtis, 19, went into labour five days before her due date last month.

When her contractions became closer together, she left her Otahuhu home with her mother and her sister and headed for Auckland City Hospital where her midwife was waiting.

Ms Curtis told the Herald that as they neared the Mt Wellington exit she knew she wasn't going to make the hospital.

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The situation was getting frantic and Ms Curtis' sister spotted a police car and flagged the driver down.

Constable Errol Diprose met with Shanelle Curtis, Tangi Roi and Xarien. Photo / Supplied via police
Constable Errol Diprose met with Shanelle Curtis, Tangi Roi and Xarien. Photo / Supplied via police

Constable Errol Diprose pulled over and immediately got on his radio to call for an ambulance.

But he knew there was no time and ended up delivering the baby - a healthy boy named Xarien.

Today Ms Curtis and her partner Tangi Roi introduced Xarien to Mr Diprose.

The new family thanked Mr Diprose for helping out, and making sure Xarien's dramatic arrival went smoothly.