After having intercourse during ovulation, the physical reaction is usually not obvious and most women do not feel anything. Some women may experience a small amount of vaginal bleeding about a week after conception, when the fertilized egg is in bed. About 12 days after conception, further vaginal bleeding occurs and most consider the onset of menstruation. If you are pregnant after intercourse during ovulation, you may also experience breast tenderness or tingling. More sensitive pregnant women may show early pregnancy reactions such as nausea, vomiting, dizziness and drowsiness under the influence of increased secretion of estrogen and progesterone in the body. These are all normal physiological reactions and do not require special treatment. If you have intercourse during ovulation, you can determine whether you are pregnant through an early pregnancy test one week after your menstrual period is delayed. If pregnancy is confirmed, ultrasound will be performed to check the development of the gestational sac to rule out ectopic pregnancy.