How do I calculate the date of my birth?

There are a lot of ways to calculate the date of birth and these means:

First Way:

The use of the birthmark calculator is a circular piece made of cardboard or aluminum in which the months and days are written. One of these shares indicates the date of the last day of the menstrual cycle. The second arrow is an indication of the date of birth and it is a very easy method used by doctors. Often in the specialty of women and childbirth and it does not need to use mental processes
.

Second way:

The method of mental computation is as follows:

Gregorian Date: First, seven days shall be added to the date of the first day of the last menstrual cycle. Second, three months shall be subtracted from the month in which the session took place, after which the year shall be added to the date of the date of the session.

Example :

Let’s say that the first date of the last menstrual cycle was 1/12/2003 / m.

7 + 1 = 8

12 – 3 = 9

2003 + 1 = 2004

After the violation will appear the expected day of birth, is: 8/9/2004

For the Hijri date, the method is as follows:

We add 14 days to the day of the menstrual cycle and then subtract from that date three months (ie, go back) and then add a year for the year in which the course came down as an example that the date of the first day of the last session is 1/5/1424 e The expected will become as follows:

14 + 1 = 15

5 – 3 = 2

Permission to calculate the date of birth, is:

15/2 / 1425H