Due Date Calculation Formula:
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EDD 28w (Estimated Due Date at 28 weeks pregnant) calculates the expected delivery date based on the current date when a woman is 28 weeks pregnant, using the standard 40-week pregnancy duration.
The calculator uses the following formula:
Where:
Explanation: This calculation determines how many weeks remain until the expected due date and converts that to days to add to the current date.
Details: Accurate due date calculation is essential for prenatal care planning, monitoring fetal development milestones, scheduling important medical tests, and preparing for delivery.
Tips: Enter the current date (defaults to today's date) and click calculate. The calculator will determine your estimated due date based on being 28 weeks pregnant.
Q1: How accurate is this due date calculation?
A: This provides a general estimate. Actual due dates may vary based on individual factors and should be confirmed with healthcare providers.
Q2: Why use 40 weeks as the standard pregnancy duration?
A: 40 weeks is the medically accepted standard for full-term pregnancy, calculated from the first day of the last menstrual period.
Q3: What if my pregnancy was calculated differently?
A: Healthcare providers may use different methods including ultrasound measurements. Always follow your doctor's calculated due date.
Q4: Can due dates change during pregnancy?
A: Yes, due dates may be adjusted based on ultrasound findings and other clinical assessments throughout pregnancy.
Q5: What percentage of babies are born on their due date?
A: Only about 5% of babies are born exactly on their due date. Most are born within two weeks before or after the estimated date.