Intercourse after ovulation basically does not affect the fertilization of the egg because if you have intercourse during ovulation, the sperm and the egg will unite on the same day if ovulation has already occurred. After the union of the fertilized egg, it will take about 15 days for the egg to enter the uterine cavity and implant under the peristaltic movement of the fallopian tube. Therefore, if you have intercourse right after ovulation, it will have almost no effect on the fertilized egg’s implantation. It is also recommended that if you have intercourse after ovulation, you should pay attention to: 1) the hygiene of your sex life; 2) the frequency of intercourse should be moderated; 3) you should pay attention to the gentle movements during intercourse. In addition, about 16 days after having intercourse during ovulation, you can go to the hospital to have a blood test for HCG to find out if you are pregnant.