How long does it take for a woman to know she is preg'`ant after $'3'x intercourse?

The date of pr`eg`ancy doesn't start with the date of intercourse instead of that it is being counted from the first day of men ur at ion (pe.....od).
Now, suppose the men.....ation date is 3rd of any month and the intercourse happened on 12th of any month then by 1st-5th of next month you can check.
See it depends on person to person, some can show little earlier and some may take little longer to determine whether she is preg`ant or not.
Generally, if preg````ncy been checked close to last men.......tion date it is probably gives the correct result. Also a gap of around 20 odd days is a factor which determines a correct result.
In case, the gap between date of intercourse and next men....tion is less then a week or two and if mens........tion doesn't occur on the due date of mens c`y`cl`e and got delayed by a week then the lady is preg```nt by 90%+


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