Fully revised and updated for 2025, from the bestselling author of Cribsheet, The Family Firm, and The Unexpected "Emily Oster is the non-judgmental girlfriend holding our hand and guiding us through pregnancy and motherhood. She has done the work to get us the hard facts in a soft, understandable way." --Amy Schumer The award-winning economist named one of TIME Magazine's 100 most influential people disproves...