A bad doubling of the HCG value may be a result of embryonic dysplasia, biochemical pregnancy or ectopic pregnancy, etc. If you have not had your period for more than 10 days, it is recommended to have an ultrasound examination to find out the size of the gestational sac and whether the pregnancy is intrauterine. If the pregnancy is intrauterine, she can be treated with fertility control. Before fertility control, liver and kidney function and coagulation tests, including D-dimer, should be checked. If there is no abnormality in the test, subcutaneous injection of low molecular heparin calcium can improve microcirculation and double the value of HCG. If the bleeding or abdominal pain worsens, a repeat ultrasound should be performed in time to find out the condition of the gestational sac.