Why is there bright red blood in 7 weeks of pregnancy when the human chorionic gonadotropin value is over 10,000 and not doubled?

7 weeks pregnant human chorionic gonadotropin value 10000mIU / ml more than point did not double still bright red blood, may be abnormal embryo quality, ectopic pregnancy and other reasons.
The early stages of pregnancy human chorionic gonadotropin HCG is usually doubled every other day, 7 weeks pregnant to observe HCG value 10000mIU/ml more than a little bit did not double and also bright red blood may be an abnormal phenomenon, first of all, we should consider the quality of the embryo is abnormal, related to the chromosomal abnormalities of the embryo, the embryo is poorly developed and so on, then it may be the case that the preterm miscarriage.
If the HCG value of 10,000 mIU/ml is not doubled and there is still bright red blood at 7 weeks of pregnancy, it may be an ectopic pregnancy, that is, the gestational sac is deposited in a location other than the uterine cavity, which is more common in the fallopian tubes, and there will be a slow growth of HCG or it will not be doubled, accompanied by vaginal bleeding and other symptoms.
If you observe abnormal HCG in early pregnancy, accompanied by vaginal bleeding and other symptoms, you should consult a doctor in time for examination and targeted treatment.