Sources say the rapper was overcome with emotion when he found out he is going to be a father, reported Showbizspy.
"He's like really on one right now and I don't know if I should say this, but Kanye was crying when Kim told him she was knocked up. I heard he got on his knees in front of Kim, she rubbed his head while he was crying and he was kissing her stomach. Guess he was overwhelmed at that point and couldn't believe he's about to be a father," a source said.
Recent reports claimed West shocked Kardashian when he announced news of her pregnancy during a gig.
The reality TV star, who was at the concert, had no idea West was going to tell the world they're expecting their first child together.
"She planned to say nothing until she started showing. Kanye was moved to blab on stage because Kim's BFF and her mom were at the show - along with several of Kanye's family members.
"Kim was crying tears of joy when Kanye revealed they're expecting, and was especially moved because he did it during one of her favourite songs... Lost in the World," the source added.