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Due Date Calculator: How Accurate Is Your Due Date Really?

Due Date Calculator: How Accurate Is Your Due Date Really? Your due date feels like everything. It's the day you circle on the calendar, count down to, plan around. But here's the reality check most pregnancy books gloss over: Only about 5% of babies are born on their exact due date. Your due date is better understood as a due "window"—most babies arrive sometime between 37 and 42 weeks of pregnancy. The standard 40-week calculation gives you a target, but your baby will arrive when they're ready. This plays out differently for every pregnancy. Consider two examples: a due date set for October 12th based on LMP, then moved to October 8th after an 8-week ultrasound -- with the baby arriving on October 17th, a full 9 days past the adjusted date. In a second pregnancy, the due date was March 22nd, and the baby came at 38 weeks and...