Of course, the Kardashian-West matriarch has sympathy for Fallon as she recalls the growing pains she faced when first expanding her brood.
"I felt the huge change—from 1 to 2 felt like 1 to 20," Kim confesses. "That was harder than 2 to 3, for me!"
In fact, Kim expects being a mom of four to be "really even."
"Right now, it's like me with two always and Kanye just has one," Kris Jenner's daughter quips. "So he's just like still living his life and I'm, ya know."
For the baby no. 4 talk and more, be sure to take a look at the exclusive clip above! Also, don't forget to catch Kim's full Tonight Show sit-down tonight at 11:35 p.m. on NBC.
(E! and NBC are both part of the NBCUniversal family.)