Good HCG doubling cannot rule out ectopic pregnancy. Good HCG doubling indicates that HCG doubling is normal, which can also indicate that the development of the embryo is normal, but it can not completely exclude ectopic pregnancy, because in early ectopic pregnancy, the embryo is relatively small, the embryo’s development is normal, and the doubling of the HCG will also be normal, but in ectopic pregnancy, the embryo grows to a certain degree, it will be developmentally restricted, so the HCG will not be normal. Good doubling of HCG can indicate that the embryo is well developed and does not determine the location of the embryo. Most ectopic pregnancies are found around 6 to 8 weeks of pregnancy and are usually accompanied by abdominal pain and vaginal bleeding. Any abnormal symptoms require prompt medical attention to clarify the cause and timely intervention to avoid delay.