The 36-year-old reality star confirmed West would like more children while addressing several rumors in a video on her website Thursday.
"If it was up to him, yes, I think he would [want a family of five or six]," she said.
Kardashian already shares 4-year-old daughter North and 20-month-old son Saint with West. She denied she has "obsessive plans" to build North's "empire," explaining she wants her daughter to enjoy her childhood.
"I love her experiencing my life and what goes on, but I also love her having such a childhood life," the star said. "One day, whatever she wants to do, I'll support that no matter what it is. So I don't push her into anything."
The Keeping Up with the Kardashians star also addressed backlash about Saint's front-facing car seat. California law states children under two must ride in a rear-facing car seat unless the child weighs 40 or more pounds or is more than 40 inches tall.
"What people didn't know is that Saint is now the weight and height requirement to sit forward-facing," Kardashian said. "Saint actually weighs more than North, if that is believable."
E! News reported in June that Kardashian and West have hired a surrogate to carry their third child to avoid another high-risk pregnancy for the reality star. Us Weekly reported the next month that the couple's surrogate is three months pregnant.