It is normal for HCG to double within 72 hours after 1. Generally speaking, in the early pregnancy, HCG increases by more than 60% every other day.

2. Serum progesterone level and HCG level will increase steadily in the early pregnancy, especially in the early pregnancy, and the HCG interval will increase exponentially in 1-2 days. If the HCG level continues to be low or does not increase exponentially, it may be threatened abortion or ectopic pregnancy. Hcg reached its peak at 8- 10 weeks of pregnancy, and then decreased rapidly.

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