"Dear Twitter, My water broke. It wasn't like Charlotte in Sex and the City. Now, timing contractions on an iPhone app," Sara Morishige Williams wrote late Monday on her Twitter feed @sara.

"The Contraction Tracker was fun until the contractions got painful," she informed her more than 14,000 followers about an hour later.

"Admitted to hospital. Got the second-to-last room," she "tweeted" early Tuesday, followed several hours later by: "Epidural, yes please."

In one final "tweet" following her request for painkillers, she wrote: "The heartbeat monitor soothes the silence of a room that will shortly be anything but silent."

Her husband then took over on his Twitter feed @ev. "Operation Baby Launch continues on track, though a bit too slowly in my opinion. That's usually the case with big launches though," he said.

That was followed several hours later by another message announcing the delivery.

"Yes! @sara gave birth to a perfect baby boy. Both are well. 8 pounds, 21 inches! Smiles all around," it said.

The couple live in San Francisco. It is their first child.

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