If you have intercourse during ovulation, it takes about 13-15 days for the fertilized egg to enter the uterine cavity to settle, grow and develop. 15 days after intercourse, you can find out whether you are pregnant by taking a blood test, which is mainly to check the blood HCG, and if the blood HCG is able to >10mIU/mL, it indicates that you are pregnant. Whether the pregnancy is intrauterine, normal or other, it is recommended to continue to check, for example, by monitoring the blood HCG can make a preliminary judgment, but also ultimately through the ultrasound to understand the specifics of the pregnancy, and regular obstetric examination.