What are the priniciples of procedure of a Pregnancy Test?

I need to know what the prinicples of procedure are of an MDS QuickCard hCG One-Step Pregnancy test...





I need this put into simpler language I can understand. : The test employs the basic immunochemical sandwich assay principle, relying on the recognition and formation of specific antibody / hCG / antibody complexes. C





Can someone explain how this procedure works in relatively simple language but scientificly.





10 points for a sensible answer please





Thank you

What are the priniciples of procedure of a Pregnancy Test?
Pregnant women make the hormone hCG. The test checks for hCG. If you have it in your system, you're preggo. If you don't, you're probably not.