Yahoo is getting a new chief executive, again: Marissa Mayer, a senior executive at Google.

A woman CEO is a welcome sight in the tech world. Yahoo had one before in Carol Bartz. That did not end well for Yahoo. Hewlett-Packard hired Meg Whitman, former eBay CEO, to clean up its problems. Virginia Rometty is CEO of IBM.

Yahoo, a tech company that made the Internet what it is today, has struggled for many years to build a business out of its email and content services. In recent years, Microsoft began running Yahoo's search services through a partnership.

Silicon Valley has not had the best rep for gender equality in recent months, with a sex discrimination lawsuit pending against venture capital giant Kleiner Perkins Caufield Byers. The junior partner who filed the lawsuit alleged that she was pressured into having sex by another junior partner and that when she ended the relationship, the firm shut her out of meetings.

This is the same industry that went crazy with feminine napkin jokes when Apple announced the iPad.

The tech world is also atwitter because Mayer tweeted Monday night that she is pregnant.

Good for Mayer. She is one of three female CEOs of a major tech company. Why not break another mold by having a baby at the helm? This is the message Facebook chief operating officer Sheryl Sandberg had for graduating college women, and one that Princeton professor Anne-Marie Slaughter refuted in a recent article in The Atlantic, "Why Women Still Can't Have it All." (Check out our Saturday op ed by author Harold Taw "Debating whether fathers can have it all.")

I am positive that a woman with Mayer's accomplishments can handle childbirth and childcare. Turning Yahoo around? That's the real labor.

Update 9:15 a.m.

Check out this AP interactive timeline on Yahoo's history and CEO turnover.