Usually 10 to 14 days after intercourse, the positive rate of pregnancy test with a pregnancy test stick is higher. To test for pregnancy, chorionic gonadotropin (HCG) is usually found in the urine as early as 6 days after fertilization, but at this time the concentration of HCG is so low that it is not easy to detect and you should wait at least another 2-3 days. After 10-14 days after fertilization, HCG concentration is a little higher to be measured. For tests using urine pregnancy tests or test strips, the results are not 100% accurate, and are often affected by factors such as whether or not the procedure is correct, and whether or not the container holding the urine is contaminated. If you want more accurate results, you can take a blood test for HCG after menopause to measure the specific quantitative value, this method is more accurate than the urine test pregnancy test, the error is smaller. In addition to this, you can also dynamically observe the doubling of HCG, progesterone levels, ultrasound, etc., to initially determine the development of the embryo.