The 30-year-old socialite is currently planning her wedding to boyfriend Kris Humphries and has vowed to start trying to conceive once they tie the knot.
She said: "I`m sure at some point in the nextyear I`ll want to have babies, so I have to get into my best shape before that.
"Maybe we`ll start trying at the end of the year. After the wedding."
Kim - who was married to music producer Damon Thomas for four years until 2004 - says her engagement to Kris is a "dream come true" and she can`t wait to tie the knot.
She added in an interview with LOOK magazine: "I didn`t put a time limit on it or an age limit. I`ve been married before, so it wasn`t my goal to get married, it`s just that I found someone I`m madly in love with and it`s worked out that way.
"It`s ironic and funny, I said, `I wanna be married at 30 and it`s happening.` It`s just a dream come true.