Kanye West and Kim Kardashian's surrogate has gone into labour

The Wests have reportedly rushed to hospital following news their fourth child is on the way.

Kim Kardashian and Kanye West's fourth child is officially on the way.

The famous couple has reportedly rushed to the hospital to be there for their surrogate, who has gone into labour with their son.

The new arrival will be a sibling to their daughter North, 5, Saint 3, and Chicago West, 1.

View this post on Instagram

Merry Christmas 🎄

A post shared by Kim Kardashian West (@kimkardashian) on Dec 26, 2018 at 3:14pm PST

Kim, 38, suffered through difficult pregnancies with North and Saint, so turned to surrogacy for her third and fourth children.

She had battled with a life-threatening condition, placenta accreta, and had been warned by her doctor not to carry her own baby again.

The news that the fourth Kardashian-West child is due imminently comes just days after rumours swirled online that he'd already been born.

On May 6, the same day she hit the red carpet at the Met Gala with Kanye, Kim took to Twitter to set the record straight.

View this post on Instagram

Camp Crystal Girl!!! 💎💎💎 Moiré printed latex with the crystal drip 💧Another new creation 🛸@manfredthierrymugler Manfred Thierry Mugler for Kim Kardashian West / MET BALL 2019 with Mugler Fashion House. Revisited archive pieces for Mugler Fashion House @muglerofficial

A post shared by Kim Kardashian West (@kimkardashian) on May 7, 2019 at 11:24am PDT

"Wait just saw news our baby boy came but that's not true.," she wrote.

"It's Met Monday, I'm in NYC. I would be at the hospital, lol."

In late April, the reality TV star threw a lavish "zen"-like baby shower to prepare for baby number four, and estimated the date of her son's birth.

"I thought it was kind of ridiculous to have a fourth baby shower. But I thought I'm freaking the f**k out having a fourth kid," Kim told her friends and family.

"So, because I'm freaking out and the baby is coming in, like, two weeks, I thought what better way to celebrate than to have a little CBD."

CBD is short for cannabidiol, the chemical compound in the cannabis plant. It's known for promoting relaxation and has been embraced in health and beauty products in the US and Europe.