"I'm going to try to have one more baby," Kim, 36, says, shocking her family members.
Upon hearing the news, both Kris and Khloe raise their eyebrows as if the revelation was startling rather than exciting.
As fans recall, Kim, who is married to rapper Kanye West, already had two difficult pregnancies with daughter North West and son Saint West.
With North, the reality TV star had the condition called pre-eclampsia, which caused her face and body to swell, and then after delivering North, her placenta stayed attached to the inside of her utuerus, which is known as placenta accreta.
After two surgeries to remove a leftover piece of placenta and then scar tissue, Kim struggled to conceive Baby No. 2. While delivering Saint, Kim reportedly suffered from similar complications.
North was born in June 2013, about a year before Kim and Kanye tied the knot in Florence Italy. The couple later welcomed Saint in early December 2015.
In the promo of Keeping Up with the Kardashians' next episode, Kim explains, "I want my kids to have siblings but the doctors don't feel like it's safe for me."
Footage then flashes to Kim lying in a hospital bed as Kris admits to her daughter, "I don't want you to do something that would put you in danger."