500
Using the WHO scoring System for GTN based on prognostic factors - which factors give you 0 points?
What is age <40, antecedent molar pregnancy, less than 4 months from index pregnancy, pretreatment BCG <103IU/L, lung metastases
All the other give you 1 or 2 points so you can ballpark :)
Remeber over 7 points gets combo chemotherapy instead of single agent. Combo therapy is etoposide, Methotrexate, actinomycin D, cyclophosphamide and vincristine.