Hi I am currently 24wks6ds pregnant, with edd of April 2, 2014. I had an ultrasound August 5 dating my due date April 2 and a ultrasound August 7w2d also giving edd of April 2, 2014. I was told the baby is measuring bigger by 6 days giving edd March 26, 2014. When I asked the Dr the conception date he said July 9, 2014 and when I do the conception calculator wih both edd the earliest I could've concieved is June 28, 2014. I had my period starting after June 10 and ending before June 21. Is there any way I could've concieved prior to my cycle and the Dr/ ultrasound give an estimated conception date off by 3- 4 wks?