What is Methotrexate is best suited when b-hCG concentration is: and explain in detail?
Ans. is a, i.e. < 5000 IU.(Ref. Williams Obs 25/e pg 378)Failure rate of methotrexate is 3.8%. If b-hCG levels are < 5000 IU but rise to 14% if levels are between 5000-10,000.