Kourtney Kardashian should call her unborn baby Kris, says her mother Kris Jenner.

The reality TV star recently announced she is expecting her second child with her boyfriend Scott Disick.

The pair already have 23-month-old Mason and Kris can't wait to become a grandmother all over again.

"It should be Kris, of course!" she giggled. "Half of me wants it to be two boys or two girls, [because] that's fun for a little playmate. And then, of course you want what they don't already have, but I am happy either way. Just [a] healthy [baby]!"

Kris added Kourtney and Scott don't have any plans to tie the knot yet.

The matriarch is looking forward to seeing how Mason adapts to being a big brother. "I think he is going to be in for the surprise of his life, because he is going to have to share the attention," she warned Us Weekly at the Hollywood Reporter's Women in Entertainment Breakfast.

On a more serious note, Kris revealed Kourtney is having a hard time with her pregnancy. The 32-year-old feels sick a lot of the time and is hoping that will pass as things progress.

"She's nauseous," Kris explained. "Very, very nauseous... Yesterday she was eating popcorn, so maybe it's the salty [taste that makes her less queasy]."

Following news of Kourtney's pregnancy, it's been claimed her sister Khlo is planning to undergo IVF in a bid to have a baby.

The 27-year-old has made no secret of her desire to start a family with basketball star Lamar Odom, her husband of two years.

"She is desperate for a baby with Lamar and will do whatever it takes," a source told Us Weekly. "They have faith the IVF will work."

Another insider added: "She's thrilled for Kourtney, but she's really sensitive. And it's hard to see your sister get something you want so badly."

The couple are said to have started enquires in September and will begin their first course of the treatment soon.