David’s Early Pregnancy Test needs to be tested more than 7-10 days after the menstrual delay to ensure the accuracy of pregnancy diagnosis. Early pregnancy test is mainly used to diagnose early pregnancy by detecting the level of chorionic gonadotropin in the urine. For women with regular menstrual cycles, early pregnancy can be detected by doing the early pregnancy test paper when it is more than 1 week beyond the normal menstrual cycle. If the menstrual cycle is usually irregular, it takes more than 16 days after sex to detect the presence of early pregnancy. In addition, because the level of chorionic gonadotropin (HCG) in the urine is still at a low level, a false negative result may occur with a premature test. Also drinking too much water can dilute the urine and affect the test results. In general, the level of HCG in morning urine is higher and less likely to be missed. It is also recommended to have a blood test for HCG in combination with vaginal ultrasound for more accurate results.