Marissa Mayer was employee No. 20 at Google and rose to the top - now she's been poached by Yahoo.Here she speaks onstage at the FORTUNE Most Powerful Women Dinner New York City at Hudson Room at the Time Warner Center on May 24, 2011 in New York City. (Photo by Jemal Countess/Getty Images for Time Inc.)

Yahoo CEO Marissa Mayer has given birth to a baby boy. Photo: Getty

Yahoo chief executive officer Marissa Mayer gave birth to a baby boy yesterday, a week ahead of her reported due date.

"Mom and baby are doing great -- we couldn't be more excited," Mayer's husband, Zachary Bogue, posted in his Twitter feed. The family hasn't yet chosen a name, and have reportedly 'crowd sourced' suggestions from family and friends.

Anne Espiritu, a spokeswoman for Yahoo, says that Mayer and the baby are healthy.

Mayer continues to lead the company, working remotely, and is planning to return to the office in about one to two weeks, Espiritu said. That's in keeping with remarks by Mayer, who said in a July interview with Fortune that her maternity leave would be brief.

The CEO "is involved in all critical decision making," Espiritu said. "She also has an incredibly strong executive leadership team in place."

At Yahoo since July, Mayer aims to reverse three years of declining revenue and market share losses to Facebook and her former employer, Google.

"I like to stay in the rhythm of things," she said in the interview with Fortune. "My maternity leave will be a few weeks long and I'll work throughout it."

Mayer, an engineer and former Google executive who helped develop the company's home page and maps products, was hired after a nine-week search for a CEO.

Bloomberg with staff writers.