Many people are very concerned about when they can detect pregnancy after intercourse between a man and a woman. In modern society, there are many ways to detect whether a woman is pregnant or not, and many women will start testing with early pregnancy test paper from the time they have intercourse, so it is important to have a firm grasp of when pregnancy can be detected. Generally speaking, it takes 4-5 days for the sperm and egg to unite after intercourse, and about 9-10 days for the fertilized egg to be bedded in the uterine cavity, and the fertilized egg has no sensation and cannot be detected before fertilization. Chorionic gonadotropin appears in the blood at the earliest, and then also in the urine, so you can detect it at home with early pregnancy test paper about 10 days after the postponement of menstruation, but due to too many disturbing factors on the early pregnancy test paper, if two red lines appear, don’t be too happy, there is also a possibility that you are not pregnant, or there is a certain chance of ectopic pregnancy, so This time, you should go to the hospital to check if you are really pregnant. Basal body temperature measurement is also an effective test to detect whether you are pregnant. Generally speaking, the body temperature in the morning in a resting state is called the basal body temperature, generally after ovulation, the level of progesterone rises, there will be a rise in body temperature, if you do not encounter a fertilized egg in the bed, the estrogen level rises, the body temperature will fall again, if you continue to have a high level of body temperature for more than 18 days, it is generally possible that there is an early pregnancy.