"After being pregnant, I would definitely say I'd never do this again," Kim, 33, told Ryan Seacrest this week on his KIIS-FM show.
"It was a really hard pregnancy. But I love my daughter so much, and I know what it was like to grow up with siblings, so I definitely want to have more."
Not that Kim will be following in the footsteps of her mum Kris Jenner, who had six children. "I definitely not going down the route my mum did. She is crazy," said the star, admitting she will have "three kids tops".
"When I was giving birth, I looked at her and said, 'I'm going to buy you a medal!"
Kim, who welcomed North in June, couldn't help but gush about her little one during the interview.
"My daughter is the cutest thing ever," she said. "I know every parents says that about their own kid! But she's the sweetest, she's the calmest and all she does is laugh.
"She will laugh at anything you say. I put my toe right near her and she'll just start cracking up. She's the sweetest, happiest baby I've ever seen."
While Kim is "loving being a mum", she admitted she didn't expect it would come so easily to her.
"I went into this so scared — so scared of everything pregnancy meant, and motherhood, and the responsibility," she confessed. "I've always wanted kids, but for some reason when I got pregnant I was so scared.
"Everything everyone tells you about having a kid – how it'll change your life, and its the greatest experience, and you'll love it … it's that times one hundred."