Safe Period And Pregnancy

First, one should know the duration of the cycle, i.e. first day of the last menstrual bleeding to the first day of the present menstrual bleeding. This is the duration of the menstrual cycle.

This duration varies from person to person & is usually between 26 to 31 days.

Ovulation approximately occurs in the middle of the cycle, i.e. duration of the cycle - (minus) 14 days (this also varies).

A week before and a week after the approximate day of ovulation is considered to be Fertile period.

The days apart from this is called the safe periods, where the fertilization does not takes place.

So, to calculate the safe period you must know the fertile period.

Calculation of fertile period: The shortest cycle minus 18 days=1st day of fertile period. The longest cycle minus 10 days= last day of fertile period.

Ex: if a women's menstrual cycle varies from 26days to 31days cycle,
The shortest cycle [26days] minus18days=8th day.
The longest cycle [31days] minus 10days=21st day.

Thus, 8th to 21st day of each cycle counting from first day of menstrual period is considered as fertile period.

Period other than this fertile period in a menstrual cycle is considered as SAFE PERIOD.

If one wants to avoid pregnancy avoid intercourse during fertile period. Safe period is safe for sexual activity.


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