If you have completed an IVF treatment cycle and are waiting to take a pregnancy test, the waiting can be stressful. Fertility clinics will usually schedule you for a pregnancy test 3 weeks after the embryo transfer. Of course, you can take a home pregnancy test before this, however if you have taken fertility drugs the levels of hCG in your blood could result in a false positive or a false negative so it is best to wait until you return to the clinic.