Usually, pregnancy can be detected with test strips after 1 week.
Test strips are early pregnancy test strips, a common tool used by women to self-test whether they are pregnant or not, which can show negative, positive and invalid results by testing the morning urine. When the control line and the test line are all colored, that is, there are two obvious red bars, may be pregnant.
The principle is that the fertilized egg in the uterine cavity will release human chorionic gonadotropin (referred to as HCG), and HCG will enter the blood and urine, and then through the urine test, HCG in the test paper synthesized colloidal gold immune complexes, the formation of the corresponding color block. It takes 7-10 days for the fertilized egg to implant, so pregnancy can be detected with test strips after 1 week.
Due to the small amount of HCG secretion in the early stage of fertilization of the egg, it may lead to errors in the results of pregnancy test paper, and can not be used as an accurate judgment. To determine whether you are pregnant or not, a more accurate method is to go to the hospital for a direct HCG test, if the value is more than 5.0IU/L, you can be judged to be pregnant after excluding other diseases.
If there is any discomfort, you should also consult a doctor in time to clarify the cause of the disease.