using this ria , we measured serum free beta hcg concentrations in 38 normal pregnant women and 72 untreated patients with 3 types of trophoblastic disease : hydatidiform mole ( n = 15 ) , invasive mole ( n = 29 ) , and choriocarcinoma ( n = 28 ) .
C0020217
hydatidiform mole
C0008493
invasive mole