Yahoo CEO Marissa Mayer Is Expecting Identical Twin Girls

The Yahoo leader plans to take limited time off from work.

The Yahoo CEO, 40, shared the happy news on her Tumblr today, writing that the "twins part was quite a surprise, because I have no family history of twins or any other predisposing factors."

Mayer said she is due in December and it appears she won't be taking full advantage of Yahoo's parental leave policy.

Mayer was back to work soon after she gave birth to her son in 2012, the same year she took over as Yahoo's CEO.

"I've shared the news and my plans with Yahoo’s Board of Directors and my executive team, and they are incredibly supportive and happy for me," she said. "I want to thank them for all of their encouragement as well as their offers of help and continued support."