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Kim Kardashian is taking her pregnancy—and her brother's health—very seriously!

In this bonus clip from Sunday's episode of Keeping Up with the Kardashians, Kim takes Rob Kardashian and Khloé Kardashian Odom to the chiropractor for a little adjustment to kick-start Rob's new diet and exercise program.

That leads to Khloé showing some nerves over having her neck cracked...especially on the "first date!"

But Kim has another question for the doctor...about the possibility of eating her placenta after she gives birth. "I know it sounds gross, but I really want to do it," Kim said. "I heard you look so young."

Um, we like Khloé's idea of putting it into pills better!

Tune in Sunday at 9/8c for another all-new episode of Keeping Up with the Kardashians, only on E!