Business Insider writes, A week ago, a source close to Google relayed something interesting about Marissa Mayer—and not that she was in the running to be Yahoo's CEO. Mayer, we were told, was expecting her first child. And now Mayer has confirmed the news to Fortune, telling the magazine that she's due to give birth in October. Mayer first learned she was pregnant in January. In mid-June, Yahoo's headhunters called Mayer to ask if she was interested in becoming CEO. She disclosed her condition to Yahoo's board. None expressed any issues. That's a huge step forward for corporate America. In 1992, Lawrence...