Correct Answer - Option 2 : Naegele’s rule
The estimated date of delivery (EDD), also known as the expected date of confinement, and estimated due date or simply due date, is a term describing the estimated delivery date for a pregnant woman. Normal pregnancies last between 37 and 42 weeks.
- Naegele's rule is named after Franz Karl Naegele, the German obstetrician who devised the rule.
- Naegele's rule is a standard way of calculating the due date for a pregnancy when assuming a gestational age of 280 days at childbirth.
- The rule estimates the expected date of delivery (EDD) by adding a year, subtracting three months, and adding seven days to the origin of gestational age.
- The result is approximately 280 days (40 weeks) from the start of the last menstrual period.
- Another method is by adding 9 months and 7 days to the first day of the last menstrual period.
The formula to calculate your Estimated Due Date using Naegele's rule :
Date of Last Menstrual Period + 7 Days + 9 Calendar Months = Date of Estimated Date of Delivery