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How Does the Due Date Calculator Work?
Getting Ready for Baby!
A full-term pregnancy usually lasts about 38 weeks from conception. Since it can be tricky to know the exact day of conception, most baby due date calculators start from the first day of your last period – this is typically about two weeks before conception. Add those 38 weeks, and you get the usual 40-week pregnancy timeline.

With all my babies, one of the very first things I was excited to do was to figure out when I would be meeting my little one. Like many moms, I’m a planner! Having a due date calculator makes this process easy and helps you start to navigate the exciting journey ahead.
- Rachel, RDN & mom of 2 boys
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