Pregnancy Calculator

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Pregnancy Tips

  • Track your pregnancy progress weekly
  • Consult your doctor for accurate due date
  • Prepare for a range of due dates (37-42 weeks)
  • Maintain a healthy lifestyle during pregnancy

About Pregnancy

Pregnancy is a term used to describe a womans state over a time period (~9 months) during which one or more offspring develops inside of a woman. The due date is typically set at 40 weeks from the last menstrual period.

Note: Results are estimations based on averages for single pregnancies.

Pregnancy Calculator: How It Works

This pregnancy calculator estimates your due date and gestational age based on the method you select. It supports last menstrual period (LMP), conception date, ultrasound dating, IVF transfer, and due date input. Results are estimates for a typical 40‑week pregnancy.

Methods Explained (LMP, Conception, Ultrasound, IVF)

  • LMP: Adds 40 weeks to the first day of your last period, adjusting for cycle length.
  • Conception date: Adds ~38 weeks to estimate due date.
  • Ultrasound: Uses gestational age at scan to project due date.
  • IVF: Uses transfer date and embryo age (3, 5, or 6 days).

Example Calculation

If your LMP is July 1 and your cycle length is 28 days, your estimated due date is around April 7 (40 weeks later). This calculator also shows your current week, trimester, and a week‑by‑week timeline.

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FAQs – Pregnancy Calculator

Which method is most accurate?

Early ultrasound dating is usually most accurate. LMP is a good estimate if cycles are regular.

Why does my due date change?

Due dates can shift with new ultrasound data, irregular cycles, or IVF timing adjustments.

Is 40 weeks exact?

No. Many healthy pregnancies deliver between 37 and 42 weeks. Use this as a planning estimate.

Does this replace medical advice?

No. Always confirm dates and care with your healthcare provider.