expected date of delivery
How to calculate expected date of delivery Date of Delivery?
A.Approximately 280 days or 40 weeks,
& calculate from day first of last menstrual periods.
B.Add 9 months + 7days to the first day of last menstrual periods....
C.Add one year minus 3months plus 7days to the first day of last menstrual period (One year-3 months +7days of day first of last menstrual period)
Ultrasonography (USG) confirmation of Gestational age is accurate if undertaken in first Trimester (First 12 weeks of pregnancy) with 95% error with margins of 6days.
USG preformed in second Trimester has an error margin of 8days & USG performed in 3rd trimester has error margin of Two weeks..
Help your obstetrician & Gynaecologists for not complicating the EDD.