You’ve read all of your free items this month. To register, get added benefits and unlimited access to articles, Become a Member. Already a Member? Sign in. Advertising Age Article Abstract Does Facebook Know You're Pregnant? What It Knows Depends on Whom You Ask: Social Network Says One Thing, Its Advertisers Another By Cotton Delo, Published on September 10, 2012 10 Want more Access, Content & Connections? Upgrade to Membership. We are glad you are enjoying Advertising Age. To get uninterrupted access and additional benefits, become a member today. Become a Member Already a member? Log in.