If you only use urine test paper to check if you are pregnant, the test is very cheap, usually only about ten dollars. Urine test paper is the easiest and most convenient way to detect pregnancy, but this result can only check if you are pregnant, but it does not tell the concentration of HCG. If you want to know more accurately the concentration of HCG and the current condition of the embryo, it is recommended to take a blood test for chorionic gonadotropin. If the menopause is more than 40 days, in addition to urine and blood tests, an ultrasound can be done at the same time to determine if the fetus is developing normally.