HCG doubling good usually means normal fetal development, but some special conditions may also cause HCG doubling good, but it will affect fetal development, such as staph and ectopic pregnancy. Therefore, in the case of HCG doubling good, you need to carry out relevant examinations to check the specific causes and carry out symptomatic treatment after clarifying the etiology. I. Normal situation: 1. normal fetal development: generally in 1-2 months of pregnancy, there will be a doubling of HCG, to about 70 days of gestation to reach the plateau, the doubling of HCG in the second month of pregnancy, and the progesterone value is within the normal range, the ultrasound results are not abnormal, then the fetal development is normal. 2. twin or multiple fetuses: when twin or multiple fetuses, the amount of HCG secreted is also more, which can also lead to The doubling is good, you can check under the guidance of the doctor, confirm that it is a double or multiple fetus and there are no other abnormalities, then there is no need to worry. If the HCG is doubled, accompanied by abdominal pain, enlarged and softened uterus, hyperthyroidism, vaginal bleeding and other symptoms, it is likely to be a gravid fetus, and once diagnosed, it should be promptly treated with uterine evacuation. 2. ectopic pregnancy: ectopic pregnancy often occurs in locations rich in blood flow, such as the abdomen of the fallopian tube and the interstitial part of the fallopian tube, and the HCG is doubled, which requires early surgical treatment. Surgical treatment is needed as soon as possible.