I would like tio know the exacly date of conception
My last period was on April 14

No one can tell the exact date of delivery, only the extimated date of conception by means of your last menstrual period. You Check this site Conception Date Calculator - BabyMed.com (http://babymed.com/Tools/Pregnancy/Conception_Date/Default.aspx) , to calculate.

Unfortunately it is impossible to tell the exact date of conception. Doctors can only estimate when you may have conceived. Only the sperm and the egg know when they met. ;)

Try this: to the first day of the last *normal* period add 7 days, subtract 3 months, and add 1 year.

Try this: to the first day of the last *normal* period add 7 days, subtract 3 months, and add 1 year.

That will give her the estimated date of delivery, not the date of conception. This is called Negele's Rule to determine EDD (estimated date of delivery).