"Once you have preeclampsia, you're at risk of having it again," her doctor warns her.
The reality star, 34, suffered from preeclampsia—a dangerous condition in which a woman's blood pressure skyrockets during pregnancy—while carrying daughter North, now 2.
According to the American Diabetes Association, some pregnant women develop gestational diabetes, though the condition usually goes away after pregnancy.
A source close to the star told People in June the Wests are expecting a high-risk delivery "but are prepared."
The reality star also discussed her true feelings on pregnancy in a post on her website earlier this month.
"I'm gonna keep it real: For me, pregnancy is the worst experience of my life! LOL," she wrote. "I don't enjoy one moment of it and I don't understand people who enjoy it. My mom and Kourtney clearly did! More power to them but I just don't relate!"
That being said, all the struggles come with a special reward: "Really, it is all SO worth it when you have your precious baby in the end," Kardashian wrote.