A blood test for HCG generally does not require fasting. HCG blood test is mainly used to detect the human chorionic gonadotropin content in human serum, which can be used to determine whether a woman is pregnant or whether there is an abnormality in pregnancy, and once the blood HCG is produced, eating, drinking or exercising, etc., will not affect the content of blood HCG in the body, so HCG blood test does not require fasting. When a woman is not pregnant, the level of HCG in her body is generally maintained between 0μg-5μg/L. With the increase of pregnancy, the level of HCG in the body will gradually rise, and the level of HCG in the body of a pregnant woman reaches its maximum at 8-12 weeks of pregnancy, and then decreases steadily. Pregnant women must go to the hospital regularly for good pregnancy tests during pregnancy and should be treated immediately for any abnormal conditions.