Kardashian posted the announcement on her website.

"With the issues I had last time, my risk of having preeclampsia and placenta accreta are increased and there's not a whole lot I can do to prevent it, so my anxiety is a little high leading up to my delivery," Kardashian wrote in a recent blog post.

The couple's first child, 2-year-old North West, was born five weeks early when Kardashian was forced to deliver the baby after her blood pressure spiked and health concerns arose.

The celebrity couple has not released the name of their baby boy, but Kardashian told People they wouldn't name the baby South. Kardashian also said her husband didn't like the name Easton.

Kardashian and West were married in 2014.