The staining of the T zone of the pregnancy test stick is mostly due to improper operation, resulting in inaccurate test results, such as too much urine being tested, and it is recommended to take morning urine again for accurate operation. If the test result, only a red line appears in the C zone, it indicates that there is no pregnancy. If the test result shows a red line in both the C zone and the T zone, it indicates pregnancy. After pregnancy, the HCG in the urine and blood will gradually increase. The pregnancy test is a common clinical method for early pregnancy detection. It is usually performed two weeks after intercourse or when the menstrual period is delayed for more than one week, and is more accurate. If intercourse is less than two weeks away, a blood test for HCG can also be performed to determine if you are pregnant. After pregnancy is confirmed, further ultrasound examination will be performed to understand the development of the gestational sac and to determine whether the pregnancy is intrauterine or extrauterine.