Sara Morishige Williams, Twitter CEO Ev Williams’ wife, is certainly making use of the company product — for the birth of their first child.

She went old-school, using text messages rather than a fancy application to post the news. Twitter, meanwhile, has gone so mainstream (at least in parts of the country) that Morishige will be far from the first person to tweet a birth. The San Jose Mercury News reported last week that expectant fathers are using the microblogging service to give minute-by-minute updates on deliveries.

Speaking of expectant fathers, Williams has actually been silent for the last few hours. Maybe he has other things to worry about …

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