Labor is hard enough but imagine an earthquake hitting at a crucial moment during delivery.

That's what happened to a mother during delivery at Greater Baltimore Medical Center on Tuesday when a 5.8-magnitude quake shook Baltimore.

The Sun's Andrea Walker reports:

She had endured 33 hours of labor when her baby's head finally appeared Tuesday afternoon.

Then the floors at Greater Baltimore Medical Center started to shake, the blinds began to sway and the medical instruments commenced clanking on the table.

She heard someone outside the delivery room shout: "Oh, my God! I think it's an earthquake!"

The mother, Jennifer, safely delivered baby John, who was born at 8 pounds, 11 ounces, less than an hour after the quake.

The interesting twist to the story is husband, Tom, is an architectural engineer whose firm had designed the maternity ward where his wife was delivering.

"I was certain the building was sound and everything would be OK," he told The Sun.

Congratulations to Jennifer and Tom.