The value of HCG in the first week of pregnancy ranges from 10-100miu/ml, the level of human chorionic gonadotropin in the body is low during this period, the simple HCG in the early stage of pregnancy can only represent the certainty of pregnancy, but it does not represent the normal development of embryo, the main thing is to observe the doubling situation, under normal circumstances, the doubling of HCG in the early stage of pregnancy can be more than 60% every other day, it can represent the normal development of embryo. In normal situation, if the HCG doubling is more than 60% on the next day, it means the embryo is developing normally. In addition, the progesterone level should be checked to see if it is normal, but in the early stage of pregnancy, you should strengthen the protection, avoid blind use of drugs, avoid examinations with electric radiation, and prohibit sexual activity, and take folic acid supplements until the third trimester. It can be determined that the pregnancy is intrauterine.