Heidi Murkoff is an American author, speaker, and entrepreneur best known for her What to Expect series of pregnancy and parenting books. She is the creator of the What to Expect brand, which includes books, websites, apps, and e-newsletters. Murkoff has written over 20 books, including the best-selling What to Expect When You're Expecting, which has sold over 34 million copies and has been translated into over 50 languages. She has also written several other books in the What to Expect series, including What to Expect the First Year, What to Expect the Second Year, and Eating Well When You're Expecting. Murkoff is a frequent speaker at parenting and pregnancy conferences, and has appeared on numerous television shows, including The Oprah Winfrey Show, The Today Show, and Good Morning America. She is also the founder of the What to Expect Foundation, a non-profit organization that provides support to families in need. Murkoff is passionate about helping parents navigate the joys and challenges of pregnancy and parenting. She is an advocate for maternal and child health, and has been recognized for her work by the American College of Obstetricians and Gynecologists, the American Academy of Pediatrics, and the March of Dimes.