That would make your estimated conception date December 30th 2010. This date might be off by a couple of days though. It also depends on the length of your menstrual cycles too.
You got pregnant on the 25th of dec and ovulated on 31st-early January.
29th may
November 24, 2011
August 1 is when you cocieved
November 9 2011
I will assume you are talking about September 4th 2011. If so, that makes your estimated conception date December 11th 2010. However, this date could be out by a couple of days. It all depends on when you actually ovulated.
Sometime around Christmas or Hanukkah is likely the date that the child was conceived.
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.
19th January 2011? That would make your conception date roughly April 27th
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.
Count back nine months from your due date.
That would make your estimated conception date January 19th 2011. However, this is give or take a few days. Often it depends on when you ovulated as well.