"Let's just say Mason is the best birth control ever," the reality star, 29, told Ryan Seacrest Thursday morning on his KIIS-FM radio show. "I'm happy to wait a few years."
Kardashian, who last September had said she wanted a baby, now says she's putting diaper duty on hold because of her hectic work schedule.
Having just signed a "huge licensing deal" with sisters Kourtney and Khloé, which will allow them to launch their own line of clothes, bags and shoes, Kim says she's too busy for babies – and boys.
"I'm single," she responds, when Seacrest asked about her relationship with a certain NFL player.
When pressed even further about Dallas Cowboys wide receiver Miles Austin, the Keeping Up with the Kardashians star simply says she's "having a good time, meeting some really great people and trying to live my life."
But, she admits, "I'm definitely in a huge love affair with my career right now!"