Kim Kardashian and Kanye West -- Baby Blocked in Maternity Ward ... By Dwight Howard

When Kim Kardashian first arrived to Cedars-Sinai to deliver her baby, she didn't get the fancy celebrity suite she had hoped for 'cause they were all in use ... and one of the VIP occupants was Dwight Howard's newest baby mama, TMZ has learned.

Sources connected to the births tell us ... before Kim went into labor, she had made arrangements to stay in one of the fancy suites at the L.A. hospital. But the baby came 5 weeks early, and the fancy suites were all booked. So Kim was placed in another unit.

But while Kim was laid out in bed, Kanye roamed the maternity ward ... and bumped into NBA superstar Dwight Howard, whose lady was giving birth to his child.

FYI -- Dwight's a seasoned vet when it comes to the maternity ward ... he's reportedly fathered 3 other kids (with 3 different women).

We're told Kanye and Dwight got along great ... with Yeezy giving Howard a preview of his new album "Yeezus."

As for Kim ... we're told she's finally out of the hospital -- and mother and the baby are shacked up in a private location.