Is it possible for a pregnancy test to tell if you are pregnant week after conception?

It is not possible for a pregnancy test to tell if you are pregnant one week after conception. Most pregnancy tests detect the presence of human chorionic gonadotropin (hCG) in the urine or blood. hCG is a hormone produced by the placenta during pregnancy, but its levels take some time to rise after conception. It can take up to several days or even weeks after the fertilized egg implants in the uterus for hCG levels to become detectable by a pregnancy test. Therefore, it is generally recommended to wait at least one week after a missed period before taking a pregnancy test for accurate results.