If you have intercourse after your last menstrual period on April 2, you can usually detect pregnancy around May 2, depending on your menstrual cycle. Generally speaking, if a woman has intercourse and her period is regular every month, she can detect pregnancy by using a pregnancy test or a pregnancy stick when her period is delayed by about one week in the second month. That is to say, the last menstrual period in April 2, then in May 2 or so will be able to detect their own pregnancy, but the specific time or need to look at the individual menstrual cycle and whether the regularity, there may be a small fluctuation fluctuations. Early pregnancy tests are recommended to use morning urine, which contains higher levels of human chorionic gonadotropin, and the results will be more accurate. If you want to determine whether you are pregnant or not earlier, you can go to the hospital for a blood HCG test after 10 days of coitus. If you want to determine whether you are pregnant or not, you can take a blood HCG test at the hospital 10 days after you have had intercourse.