Generally, pregnancy can be detected with early pregnancy test 15-20 days after intercourse. The time to detect pregnancy varies due to the length of a woman’s menstrual cycle, as well as the early and late ovulation and the rate of rise of human chorionic gonadotropin in the body. Women with shorter menstrual cycles and early ovulation are more likely to detect pregnancy earlier. Normally, a fertilized egg can be formed 2-3 days after intercourse, and the fertilized egg secretes human chorionic gonadotropin after it has settled. When the hormone level in the body rises to a certain level and reaches a certain threshold in the urine, pregnancy can be determined by testing the urine with early pregnancy test strips. It is advisable to use morning urine for the initial urine test to avoid dilution of the urine due to drinking factors, which may affect the normal test results.