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Kim Kardashian

GAMR/FAMEFLYNET PICTURES

Kim Kardashian and Kanye West welcomed their son Saturday morning, and the proud parents couldn't be any more thrilled that baby West has finally arrived.

"The last few days were very stressful," a source tells E! News exclusively. "It was time."

Fortunately, mother and son are both doing well, and although the days leading up to Kim's delivery were stressful, she had plenty of family members on hand for moral support. In addition to Kanye, of course, Kris Jenner, Kourtney Kardashian and Khloe Kardashian all joined Kim at the hospital.

Watch Keeping Up With the Kardashians this Sunday at 9 p.m., only on E!