A Page-A-Day Countdown To The Birth Of Your Baby 160; The average pregnancy lasts 280 daysmdash;and the suspense can be excruciating The Pregnancy Countdown Book counts down the biggest milestones every step of the way, with one page of helpful information for each day of your pregnancy. Here are tips from doctors and mothers, amusing anecdotes and quotes, and all of the uncensored details that other books wonrsquo;t tell you. 160; The perfect gift for expecting moms of all ages, The Pregnancy Countdown Book is a delightfully irreverent look at the craziest nine months of your life.