for july 31 Possible Dates of Conception: November 4 to November 12, 2007

for july 19 Possible Dates of Conception: October 23 to October 31, 2007

if my first and last day of my period was 1-3 when did i conceive bcuz i had cheated on my husband on the 8 r 9 and the 22nd could it be his?

The first day of my last period was September 17,2008.When did i conceive???

My first day of my last period was either the 17th or 18th dec 2008 and the last day was the 21st Dec 2008.Had sex with my boyfriend on the 30 dec and the 5th jan 2009. When did i conceive?

my due date is april 19th

my due date is 20th sept when did i conceive?

december 27th, or around there (if your LMP was was november 13th and you have a 28 day cycle). you add 7 days and 3 months to your due date to get date of conception.