Like many Facebook users, Mark Zuckerberg turned to the social network to announce that he and his wife were expecting a baby.
But in addition to the usual baby bump photo and giddy sentiment about the impending arrival, Facebook's founder and chief executive included a somber message in his post: He and wife Priscilla Chan have suffered three miscarriages in the last two years.
It was a rare and deeply personal revelation, not just for the famously private Zuckerberg but for anyone on Facebook. Despite the company's mission to be the ultimate place for everybody to share just about everything, most people populate their feeds with only the most flattering of posts — engagement and wedding news, vacation pictures of exotic locales, promotions at work and other not-so-humble brags.