If you have intercourse for a week, you will not have any reaction, because when women have intercourse during ovulation, the sperm and egg will be combined to form a fertilized egg on the day of intercourse, and it will take about 30 hours for the fertilization to take place, and then the fallopian tube will gradually send it back to the uterus, and it will take about 5-6 days for it to come back to the uterus for implantation, so there will be no symptoms. This is a normal physiological phenomenon and it takes about 4-5 days for the implantation to end. After successful implantation, the trophoblast cells of the placenta start to secrete human chorionic gonadotropin gradually, so at least about 10 days after intercourse, blood tests can be taken to check the value of human chorionic gonadotropin, which will appear to be significantly higher.