Early pregnancy tests are usually available after 14 days after intercourse, or after your period has been delayed for 2-3 days. Early pregnancy tests are used to determine pregnancy by detecting human chorionic gonadotropin in the urine. The earliest a woman can detect pregnancy is by taking a blood test for HCG about 7-10 days after intercourse. Each woman’s body type varies, and the timing of fertilization of the egg and secretion of human chorionic gonadotropin may also vary. It is recommended that a pregnancy test be conducted about two weeks after intercourse to determine if pregnancy is occurring more accurately. Although early pregnancy test can be timely to know whether a woman is pregnant, but the test result is positive, can only be diagnosed as pregnancy. It is necessary to go to the local hospital for ultrasound testing to determine whether the pregnancy is intrauterine.