Heidi Murkoff is the author of the What to Expect®; series and author of Eating Well When You're Expecting, The What to Expect Pregnancy Journal & Organizer, What to Expect the First Year, The What to Expect Baby-Sitter's Handbook, and the What to Expect Kids series from HarperCollins. Her interactive website is www.whattoexpect.com, and she lives with her family in Los Angeles, California. Photo by Heidi Murkoff (Email) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons.