Kardashian, 34, shared her fear with her family in a promo for Season 11 of their show "Keeping Up With the Kardashians", reported Us magazine.
Kardashian, who is expecting a son in December with husband Kanye West, 38, suffered from potentially deadly preeclampsia when she was pregnant with daughter North West in 2013, and on a routine doctor's checkup, she learned that she could be in even more trouble this time around.
"Once you have preeclampsia, you are at risk for having it again," Kardashian's doctor warned her in a scene from the upcoming season of the reality show.