How many days does a deep and light pregnancy usually last?

One deep and one light usually refers to the test result of the early pregnancy test paper, which is weakly positive, in fact, the pregnancy is about 15~20 days.
Calculated from the beginning of conception, a deep and light test result usually represents a woman’s pregnancy within 15 to 30 days, but this judgment is not accurate, and the clinical judgment of the number of days, weeks and months of pregnancy, usually by the first day of the last menstrual period to start counting, so at this time the pregnancy may be in about 30 to 35 days.
Because the level of human chorionic gonadotropin in a woman’s body is not very high when she is first pregnant, the test will be weakly positive, with two bars, one dark and one light. As the duration of the pregnancy increases, it will change to a more obvious positive two bar result.
It is recommended that women should relax, do not be anxious and nervous, and at the same time have a good lifestyle, regular checkups to understand the development of the fetus.