I believe its 9 1/2 months prior if the baby is carried to term and is born naturally.
June 18 2006
6th June
Based on a normal gestation period of 40 weeks the conception date was June 28th of the previous year.
Roughly June 8th
http://weekspregnant.co.uk/conception_calculator.html
The approximate date of conception was June 13th
The approximate date of conception was June 17th
The approximate date of conception was June 28th
The approximate date of conception was September 29th
June first week.
Jan 7, 2007
The approximate date of conception was June 5th 2008.