Last Menstrual Period
Conception Date
Due Date
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Days Pregnant
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Days Remaining
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Weeks Remaining
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👶 Baby Development This Week

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📅 Important Milestones

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📚 Pregnancy Calculator Information

How it works: This calculator uses the standard 280-day (40-week) pregnancy duration from the last menstrual period (LMP) to estimate your due date and track pregnancy progress.

Calculation Methods:

  • Last Menstrual Period: Most common method, adds 280 days to LMP
  • Conception Date: Adds 266 days to known conception date
  • Due Date: Works backward to calculate other dates

Pregnancy Trimesters:

  • First Trimester: Weeks 1-12 (0-84 days)
  • Second Trimester: Weeks 13-27 (85-189 days)
  • Third Trimester: Weeks 28-40 (190-280 days)

Important Notes:

  • Only 5% of babies are born exactly on their due date
  • Normal delivery range is 37-42 weeks
  • First pregnancies often go past the due date
  • Ultrasound dating may be more accurate than LMP dating

⚠️ This calculator provides estimates. Always consult with your healthcare provider for accurate pregnancy monitoring and medical advice.