we found that ( 1 ) an increase in sensitivity occurred at the expense of specificity , ( 2 ) the quantitation of the beta-subunit of human chorionic gonadotropin in serum proved to be the most reliable test for pregnancy , and ( 3 ) the latex agglutination inhibition tube test ( placentex ) was the most accurate of the four types of urine tests evaluated .
C0106132
beta-subunit
C0032961
pregnancy