The road hasn't been without its bumps, however.

In September, the family experienced a medical emergency when Kourtney was hospitalized and underwent an urgent fetal surgery. Travis, who was on tour in Europe at the time, flew back to California. 

"I will be forever grateful to my incredible doctors for saving our baby's life," Kourtney, who was later put on bed rest ahead of giving birth, shared on Sept. 6 after the procedure. "I am eternally grateful to my husband who rushed to my side from tour to be with me in the hospital and take care of me afterwards, my rock."

She continued, "As someone who has had three really easy pregnancies in the past, I wasn't prepared for the fear of rushing into urgent fetal surgery. I don't think anyone who hasn't been through a similar situation can begin to understand that feeling of fear."