How does pregnancy test paper show pregnancy?

Pregnancy test paper shows two clear red lines usually indicates pregnancy.

Pregnancy test paper by detecting the level of human chorionic gonadotropin (HCG) in the urine to determine whether pregnancy. When the fertilized egg implantation, the body will begin to secrete HCG, as pregnancy progresses, HCG levels will gradually increase. If there are two red lines on the test paper, that is, the control line and the test line are colored, and the color of the test line is clear, pregnancy is generally determined. This indicates that the HCG content in the urine has reached a certain concentration, enough to be detected by the test paper. If only the control line is displayed, but the test line is not colored, it means that there is no pregnancy. At this time, it may be that the test time is too early, and the HCG level has not yet risen to the detectable range.

If there is doubt about the results, it is recommended to seek medical attention promptly.