Two months after pregnancy, miscarriage occured and DNC was done. Then, after further problems like excessive bleeding, pain was observed. In the sonography report, invasive mole was observed. The
beta HCG harmone level was 110000. Then we took 8 cycles of methotrexate therapy. Now, the beta HCG levels is 6857. The mole in the uterus still persists. Please suggest.