Yahoo CEO Marissa Mayer just had baby twin girls

REUTERS/Ruben Sprich

Yahoo CEO Marissa Mayer announced that she just gave birth to twin girls. 

"Zack and I are excited to announce that our identical twin girls were born early this morning. Our whole family is doing great!," Mayer wrote in a tweet on Thursday morning. 

The news comes as Mayer is facing a critical and challenging period at Yahoo, which has been under pressure from activist investor Starboard Value and which announced just yesterday that it would undertake a complex "reverse spin out" of the core internet business. 

Mayer's leadership of Yahoo meanwhile, is facing increasing criticism more than three years into a comeback effort that has so far showed little progress.

Appearing on CNBC just yesterday, Mayer was asked about the twins and the potential time off she would take as a result. 

"It will happen later this month. And yes there’s always a lot to do on both the home front and the work front," she said. 

Tweet Embed:
https://twitter.com/mims/statuses/674999401975119872
Zack and I are excited to announce that our identical twin girls were born early this morning. Our whole family is doing great! @zackbogue

 When Mayer was hired to be Yahoo's new CEO in July 2012, she announced on the same day as her new job announcement that she was six months pregnant with a boy. Her decision to take only a few weeks of maternity leave and to work throughout it, caused a big debate, with some criticizing Mayer for setting an example that would be impossible for other working mothers to match. 

Earlier this month Facebook CEO and founder Mark Zuckerberg became a dad with the birth of his daughter. Zuckerberg has said he will take two months of paternity leave. 

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