The normal value of hcg, or human chorionic gonadotropin, is relatively low on day 5 of pregnancy, usually greater than 20 units. Regular hormone monitoring is needed because it takes about a week for human chorionic gonadotropin to be monitored in the blood, because it is only then that the fertilized egg begins to lay and then begins to secrete human chorionic gonadotropin, which can be checked in the blood. Human chorionic gonadotropin is important for a normal pregnancy to reduce the rejection of the pregnancy by the uterus and to maintain the growth and development of the fertilized egg to avoid abnormal development. The value of human chorionic gonadotropin varies greatly from one individual to another and requires dynamic examination to give a good indication of whether the pregnancy is normal. It is important to pay attention to the presence of abdominal pain, nausea, vomiting and other discomforts after pregnancy to prevent preterm abortion or other serious consequences.