A low blood HCG value is associated with many factors. Secondly, the observation of a healthy fetal development is not based on the number of values, but on the doubling of HCG. The presence of a low blood HCG value is considered to be a result of a late stage of implantation and too early testing. The human chorionic gonadotropin in the blood is too low. It is recommended to take blood tests after a week and compare the previous results to see the doubling of HCG. If the cause is the embryo itself, poor embryonic development or chromosomal abnormality of the embryo, it is recommended to combine with the progesterone value for a comprehensive analysis. Exogenous luteinizing support can be given temporarily and the blood value should be rechecked regularly to check the doubling, while paying attention to rest and a light diet to prevent preterm abortion. Secondly, it may be an ectopic pregnancy. Regular blood tests should be done to check for doubling of HCG values. An ultrasound is recommended around 40 days of pregnancy to check for the formation of a gestational sac in the uterus. It is also important to closely monitor for abdominal pain and bleeding. Therefore, it is important to actively seek medical advice to identify the cause of low blood HCG level and not to take medication on your own, but to analyze the cause and treat it accordingly. Therefore, there are many reasons for low blood HCG values, and it is important to identify the cause before treating it symptomatically.