A source told E! News, "Kim and Kanye love having their kids run around and be able to grow up and enjoy each other as siblings," adding the couple are saying "over the moon excited to have another child."
Kim, who was previously advised it was too dangerous to carry another child, turned to surrogacy to have her second daughter, Chicago.
Though the Keeping up with the Kardashians star admitted she found it hard not being in control.
"It is frustrating, like, to not be able to do it on your own," Kim revealed on KUWTK in 2017.
"It is a weird dynamic. Like I go to all the doctor's appointments and I try to be really present, but when you're not carrying it yourself it is such a fine balance of how much you're going to be in their lives. Of course I want to know ever last detail that's going on with my baby and that's super frustrating, but I really trust my surrogate and I don't want to be that person that's trying to control her every move."