Pregnancy—unquestionably one of the most profound, meaningful experiences of adulthood—can reduce otherwise intelligent women to, well, babies. We’re told to avoid cold cuts, sushi, alcohol, and coffee, but aren’t told why these are forbidden. Rules for prenatal testing are hard and fast—and unexplained. Are these recommendations even correct? Are all of them right for every mom-to-be? In Expecting Better, award-winning economist Emily Oster proves that pregnancy rules are often misguided and sometimes flat-out wrong. A mom-to-be herself, Oster debunks the myths of pregnancy using her particular mode of critical thinking: economics, the study of how we get what we want. Oster knows that the value of anything—a home, an amniocentesis—is in the eyes of the informed beholder, and like any complicated endeavor, pregnancy is not a one-size-fits-all affair. And yet medicine often treats it as such. Are doctors working from bad data? Are well-meaning friends and family perpetuating false myths and raising unfounded concerns? Oster’s answer is yes, and often.