Negative hCG in a woman’s blood and urine is a reliable indicator for determining whether she is pregnant or not. The main function of hCG is to increase the secretion of steroid hormones to maintain pregnancy, stimulate the production of luteinizing hormone, promote male fetal sexual differentiation, stimulate thyroid activity, etc. After production, it is excreted into the urine through the blood circulation of pregnant women and is in a parallel relationship. After women conceive, hCG appears in both blood and urine, so the clinical diagnosis of pregnancy is made by measuring the hCG value in women’s blood and urine, and blood hCG test is more accurate than urine hCG test. A negative test indicates no pregnancy, while a positive test indicates a pregnancy. However, certain pathological conditions such as chylothorax, chorionic epithelial cell carcinoma, spermatogonial testicular cancer and other hCG-related diseases may also show positive serum hCG results, which should not be taken lightly and should be judged by other tests under the guidance of a doctor. Negative hCG is an indicator to determine whether you are pregnant or not, and negative means you are not pregnant.