<unk>  is an agglutination inhibition test performed on a urine sample to detect pregnancy. It is based on double antigen antibody reaction. The test detects the prevention of agglutination of HCG-coated latex particles by HCG present in the urine of pregnant women.
Gravindex
Mentzer index
Challacombe scale
Horowitz index
Haller index
Baux score
BODE index
Eagle score