Usually, pregnancy can be detected about 10 days after intercourse. If intercourse is scheduled during a woman’s ovulation period, sperm may meet a mature egg in the fallopian tube and then combine to form a fertilized egg, which usually occurs 24-48 hours after intercourse. The fertilized egg will gradually enter the uterine cavity from the fallopian tube, and then complete its implantation in the uterine lining. However, it is not usually possible to detect pregnancy after the fertilized egg has been deposited, and blood tests for human chorionic gonadotropin are usually not available until about 7 days after the fertilization of the fertilized egg has been completed. So about 10 days after intercourse, it is usually possible to detect pregnancy. For couples who are planning to have a baby, both husband and wife should complete the pre-pregnancy checkup, maintain emotional stability, avoid exposure to tobacco and alcohol, regular work and rest, and avoid staying up late to ensure physical and mental health, which will help to conceive a healthy baby.