Goldie Hawn told Kate Hudson to imagine her "va-jay-jay" was a "flower blossoming" during childbirth.

Kate endured an 18-hour labour before giving birth to her son Bingham in July 2011.

The 33-year-old says her famous mother's advice during the process was slightly eccentric.

"She puts on these reading glasses that have headlights on them. I have my doctor and my mom kind of looking over with these headlights," she explains on The Ellen DeGeneres Show.

"And she brings a magnolia flower. And she sort of starts to do these visualisations with me. And she's going, Imagine your va-jay-jay as a large magnolia flower blossoming."

Goldie wasn't the only one to get involved in the birth Kate's rocker fiance Matt Bellamy was just as determined to be there every step of the way.

However, the 33-year-old actress wasn't quite so keen to have the Muse frontman witness everything.

"I was like, Stay back.' I put up tarps," she laughed to Ellen. "I was like, Don't go anywhere near the area.' And I see him start to creep. I'm like, No, no, get back!' Meanwhile, my mom's going to the doctor, That's not normal. It that normal?' It really was a Woody Allen film."