The second bar on the pregnancy test is very light, or weakly positive, and is generally considered to be caused by a short pregnancy test, so it is recommended that you take another pregnancy test a few days later. A woman can take a pregnancy test 15 days after intercourse to see if she is pregnant. If the test time is too short, the HCG (human chorionic gonadotropin) level in the urine may be too low, resulting in the second bar of the pregnancy test to be very light, that is, a weak positive result, and it is recommended to take the test again in a few days. If the test taker is in a hurry, she can also go to a regular hospital to take a blood HCG test about 10 days after intercourse, which can directly diagnose whether she is pregnant or not, because blood HCG is the gold standard of pregnancy test. In addition, if a woman is diagnosed to be pregnant, she is advised to consult a specialist for guidance and terminate the pregnancy in time if she has no need for reproduction, so as to minimize the harm of abortion to the body.