Due Date Calculator

Naegele's Rule

The due date is calculated using Naegele's rule, which:

• • Adds 280 days to LMP
• • Adjusts for cycle length
• • Assumes 14-day ovulation
• • Estimates 40-week pregnancy

Important Notes

• • Only 5% deliver on due date
• • Normal range: 37-42 weeks
• • Regular prenatal care is vital
• • Dates may be adjusted by ultrasound

First Trimester

• • Weeks 1-13
• • Major organ development
• • Morning sickness common
• • Frequent prenatal visits

Second Trimester

• • Weeks 14-26
• • Baby movement felt
• • Gender can be determined
• • More energy typically

Third Trimester

• • Weeks 27-40
• • Rapid baby growth
• • More frequent check-ups
• • Birth preparation