HCG is human chorionic gonadotropin, 13IU/L does not mean pregnancy, can be combined with other tests to determine the overall. HCG of 13IU / L does not mean that the woman is pregnant, because the clinical diagnosis of early pregnancy, blood HCG quantitative immunoassay concentration > 25IU / L is defined as a positive pregnancy, and between 5 to 25IU / L suspected pregnancy. For HCG of 13IU/L, further vaginal ultrasound should be done or combined with other values such as progesterone to comprehensively diagnose pregnancy. If HCG is 13IU/L, and vaginal ultrasonography reveals echoes in the uterine cavity, elevated progesterone values, and delayed menstruation for more than 10 days, then pregnancy can be diagnosed. Those who are clearly pregnant and have the desire to have children can take folic acid as prescribed by the doctor to prevent fetal neural tube malformation.