If your next period is on 1/10/2006 then your ovulation probably occured around 27.12 2005. Conception occurs a few hours after ovulation. Pregnancy-tests detect the hCG-hormone produced by the embryo. An embryo develops when the fertilized cell-egg embeds itself in to the wall of the uterus. This embedding occurs 8-10 days after conception, in your case between the 5th or the 6th of January. All pregnancy tests made before the 5-6th of January 2006 will be negative, even if you have conceived. So you don’t need to wait until 1/10/06 to confirm, but you WILL have to wait until 1/6/06 before you administer a pregnancy test.