Based on a normal gestation period of 40 weeks the conception date was September 13th.
Probably September
6th June
Roughly June 12th
http://weekspregnant.co.uk/conception_calculator.html
Roughly June 8th
June 18 2006
June first week.
September 9th 2012
Roughly Thursday September 11th 2008
The approximate date of conception was June 17th
The approximate date of conception was September 29th
The approximate date of conception was June 27th