No, a negative pregnancy test result with homeopathic HCG does not mean that the HCG is not potent. We tested this ourselves before we started using the homeopathic. When the homeopathic HCG did not turn a pregnancy test positive we asked the same question of both our homeopathic specialist and another doctor. Both confirmed that this was the expected result (negative pregnancy test) because it is a homeopathic formulation, which would require a different testing method. Specifically, homeopathy is based on both physical ingredients that you can see and resonance/frequencies that you cannot see, but these are not cheaply or easily measured. It is for this reason why you want to be sure you are dealing with an experienced, reputable lab. The manufacturer we use for our products is “a federally registered pharmaceutical laboratory in full compliance with FDA regulations governing pharmaceutical manufacturing facilities.”