It usually takes 7 to 10 days after intercourse to be able to detect it with test strips.
Test strips to detect pregnancy is mainly to detect human chorionic gonadotropin, this hormone is mainly produced by gestational trophoblast cells, after intercourse, if there is an egg discharged, the sperm and the egg will form a fertilized egg in about 7 hours, and after the formation of the fertilized egg on the 6th day of the human chorionic gonadotropin will be produced.
At this time, elevated hormone levels can be detected if blood is drawn, and hormones can also be found in the urine, which can be measured using test strips.
It can be detected with test strips as early as about 7 days after intercourse, but it may be delayed by two days, for example, the egg is not discharged until two days after intercourse to form a fertilized egg, or the hormone level may be low at the beginning, which is undetectable in the urine, and can usually be detected two days later.
Each person’s situation is different, the time to detect the test paper after coitus may also vary, it is recommended to wait for two more days, if necessary, you can go to the hospital to draw blood for examination.