The time to check the blood HCG after intercourse is related to whether the woman is in ovulation at the time of intercourse, if she is in ovulation, she can be checked 7 days after intercourse, if she is in non-ovulation, she can be checked 7-10 days after intercourse. If you have intercourse a few days before ovulation, you may also be fertilized, but you need to wait until ovulation to form a fertilized egg, so the time for HCG to appear in the blood will be extended accordingly, so you need to test the blood HCG 7-10 days after intercourse. It is recommended that further ultrasound examinations be done after a period of time to determine if a gestational sac has been produced, so as to determine whether pregnancy is more accurate. In the early stage of pregnancy, it is important to take more rest and avoid strenuous exercise and intercourse. Take proper supplements of high quality protein and vitamins, you can eat milk, soy products, carrots and other foods in appropriate amounts.