By the Numbers Your Due Date Is a Guess. Here’s How the Math Actually Works.The 200-year-old formula behind every pregnancy wheel uodated to today, why only 5% of babies arrive “on time,” and a free interactive tool you can spin right now.Amos Grünebaum, MDFeb 10, 2026∙ Paid2ShareContinue reading this post for free, courtesy of Amos Grünebaum, MD.Claim my free postOr purchase a paid subscription.PreviousNext