How to count the supposed birth date?

September 16 posted in Pregnancy Symptoms

According the study of majority birth, the pregnancy period usually goes 281 or 282 days.

Rule of Negele is a mathematic formula that makes the birth date counting easier.

Determine the first day of the last menstruation, then add 7 days and subtract 3 month. This will be day and month of expected birth.

Presented formula is very exact to predict the birth for females with regular menstruation cycle.

If the fecundation date is well known – the pregnancy period will be count since that day by adding 2 weeks to the date that you have from formula.

First 3 month of pregnancy ends at 14^th week, and second 3 month of pregnancy ends at 28^th week.

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