{blackbabes} Beyonce Big Security Meeting Before Blue Ivy's Birth

74438_Work that Confidence: Sofia Vergara for Kmart

Beyonce's delivery of baby Blue Ivy was not some haphazardly thrown together ordeal -- it was an elaborate plan involving hospital honchos and a big security force ... TMZ has learned.

According to our sources, the hospital held a meeting leading up to the delivery to discuss a security plan for the birth. We're told the meeting between execs and security was held Friday afternoon and strict security was in place almost immediately, preparing for Beyonce's late night delivery.

The goal, keeping Beyonce's delivery under wraps, succeeded admirably -- no pictures of Bey or hubby Jay-Z entering or exiting the hospital have emerged ... and she hasn't been seen at all since Thursday.