I had an abortion August 7 2012 never got a period after and now am pregnant again and my due date is June 6th 2013 and had several ultrasounds and my due date never changed. When would I have conceived since I don't have a period date to go off.. anyway August 18-19?!

Serious answer: Calculating conception dates is an inexact science. The best calculation would cover a 2 week range.

And why would you think we would give less than serious answers?

No ones actually helped on a date... :( or a guess.. and all the calculators give a different time frame

That's the point! The calculation is inexact, Different methods will give different results.

Why are you so concerned?

According to my gestational wheel, the same one used in your doctors office, according to your due date, you most likely conceived on or around September 12.

If paternity is in question you will need to have a DNA test done once the baby is born.

I agree, the issue is conception date is plus or minus one to two weeks, so with a Date of Sept 12, it means that conception happened last couple days of Aug or sometime during the month of Sept.

That is as exact as it can get, there is no EXACT time. Unless there is a issue of multiple partners, the exact conception date does not matter anyway.

If there is a issue of multiple partners, a DNA test after the baby is born is the only way to determine