Calculate due date dating scan
Pregnancy normally lasts from 37 to 42 weeks from the first day of your last period.To find your due date, enter the date of the first day of your last period, and click 'calculate' - the calculator will do the rest.There is no scientific and medical way to examine the accuracy of your pregnancy.
A regular menstrual cycle is one where the duration between menstrual cycles is 28 days.
But in case of irregular cycles, the following methods can be applied.
The date of the last menstrual period can be determined as earlier explained.
It is important to note that none of the methods above is totally accurate.
The calculation of the due date from this symptom, however, depends on if you have regular or irregular menstrual cycles.
It is easier to calculate a due date when you have regular cycles.
This kind of test is more appropriate during the earlier weeks of pregnancy – when most babies develop at the same rate.
In the latter weeks, some babies develop faster than their counterparts.
If you have menstrual cycles that are longer than 28 days, which is considered to be an irregular cycle, you need to perform some simple calculations to come up with a proper last monthly period date.
You need to determine roughly how long it takes from the first day of a menstrual period to the start of the next one.
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