That makes your estimated conception date February 13th 2011. However, this date could be wrong by a couple of days. It depends on when you ovulated.
November 9 2011
I will assume you are talking about November 3rd 2011. If so, this makes your estimated conception date February 9th 2011. This date is give or take a few days though. It also depends on when you actually ovulated.
Roughly February 27th
I will assume you are talking about November 10th 2011. If so, your estimated conception date is February 16th 2011. This date is give or take a couple of days though. It also all depends on the length of your menstrual cycles.
The approximate date of conception was March 4th
That makes your conception date roughly February 12th 2011. However, this date could be wrong by a couple of days. It should not be used to work out paternity either.
29th may
November 20th
The approximate date of conception was February 18th
The approximate date of conception was February 27th 2009
The estimated date of birth is November 11th
August 1 is when you cocieved