Generally about 1 month pregnant can be measured with a pregnancy test paper, but the exact time exists individual differences. Female fertilized egg implantation pregnancy after placenta syncytiotrophoblast trophoblast cells will produce a large number of human chorionic gonadotropin, human chorionic gonadotropin in the urine will also rise, you can use the early pregnancy diagnostic test paper to test the urine to determine whether pregnancy. Generally about 10 days after intercourse or after a regular menstrual delay of 3 to 7 days you can use a pregnancy test paper to test the HCG in the urine to determine whether you are pregnant or not, if the test result is positive, it means that the chances of pregnancy are very high, it is recommended to go to the hospital for further examination. As long as you follow the instructions and use the pregnancy test paper, the results are highly accurate. However, some women have a long menstrual cycle and the fertilized egg is late in implanting, so the time to detect pregnancy may be delayed, but usually not more than 40 days. If a woman’s menstrual period is delayed after intercourse, she can use a test strip or combine it with a blood HCG test to determine whether she is pregnant.