The scanning software checks for: Endocrine balance, Hormone levels, Amniotic concentration, Carbohydrate level, Ketone (ketosis/lipolysis), Ovulation status, Bovine Encephalitis, Distemper, and Progesterone infusion. The remote testing system then checks the levels and calculates the likelihood of your being pregnant.
They also say: "Our results are 100% guaranteed. Please note we only guarantee that you'll get a result, not that the results will be accurate." I also liked the section where it tells you the identity of the father of your baby!
http://www.thepregnancytester.com/
By the way... I'm with child it says, and the father is Janet Reno.
