Mam unprotected sex after 4 days of period end means 8th day of cycle. Is having a cycle of 30 days. 8 is considered to be safe.

It is called safe period of family planning but it is unsafe meaning high failure rate. In a woman having 28 days regular cycle safe period is considered as from day 1 to 10 and 17 to 28 counting from first day of last period. If periods have different cycle depending on that counting changes.In 30 days cycle safe days are 1 to 14 and 19 to 30 but body does not behave like mathematics and that is why not reliable method 

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