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 to find out the size of the gestational sac and whether the pregnancy is intrauterine. If there is no abnormality in the examination, subcutaneous injection of low-molecular heparin calcium can be given for fetal preservation treatment. If there is any abdominal pain or bleeding, it is important to monitor the pregnancy. If the bleeding or abdominal pain worsens, a repeat ultrasound should be performed in time to find out the condition of the gestational sac.