Early pregnancy stick to detect pregnancy generally 7 to 10 days after intercourse can be measured pregnancy, if you want to determine whether it is intrauterine pregnancy or whether the embryo is well-developed, but also need to go to the regular hospital for blood β-HCG or abdominal ultrasound, dynamic observation. Early pregnancy stick for testing, need to be based on the human chorionic gonadotropin in the urine to check, if the time is shorter than the human chorionic gonadotropin in the urine can not reach the concentration of the test. In order to ensure the accuracy of the early pregnancy stick test, generally need to have intercourse 7 to 10 days to test. Early pregnancy swab tests to determine if you are pregnant may show false positives or false negatives. If you want to determine whether you are pregnant, the most accurate way is to go to the hospital for a blood test to check the blood chorionic villus hormone or abdominal ultrasound; to confirm whether you are pregnant or not. When using a pregnancy test, patients should not drink too much water within two hours before taking the morning urine, so as not to cause dilution of the urine and false-negative results.