Early pregnancy tests can detect pregnancy as early as a few days after having sex once or not using contraception for a long time. Many women want to know whether they are pregnant as soon as possible. Early pregnancy tests can help women determine whether they are pregnant, and the test can be done as early as about 7 days after conception. First of all, a woman\’s eggs are released during her monthly menstrual cycle. If she has sexual intercourse at this time and sperm enters her body, she may become pregnant. After conception, the sperm will enter the egg. At this time, the first cells have begun to form and begin to remove the pit.