# https://childbirth.org


## Posts

- [Why Pregnancy Math Feels Wrong But Isn’t - How Pregnancy Due Date Changes Are Calculated](https://childbirth.org/why-pregnancy-math-feels-wrong-but-isnt-how-pregnancy-due-date-changes-are-calculated/): Confused about pregnancy math? Learn how pregnancy due dates are calculated, why you’re 4 weeks pregnant at a positive test, and how ultrasound dating works.

## Pages

- [Pregnancy Playbook Posts](https://childbirth.org/blog/)
- [The Real Labor Timeline and Other Guides for Pregnant People](https://childbirth.org/): A no-fluff labor guide for pregnant people who want to understand what’s happening, what to do, and when to actually pay attention. Grab your copy for just $7. Written by a doula and mother of 9 with over 35 years of experience.
- [Privacy Policy](https://childbirth.org/privacy-policy/): You can see the entire privacy and policy links here.


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