If your period is delayed after intercourse, it is important to find out if the sperm and egg have united to form a fertilized egg during intercourse and are clinically pregnant, which is why your period is not coming. In this case, it is recommended to do an early pregnancy test, and if you are not pregnant after the test, you can continue to observe. If you haven’t had your period for a week, you can do another test with the early pregnancy test. If the result is still negative, it clinically indicates that you are not pregnant and you can take oral progesterone to induce menstruation. In clinical practice, menstruation is affected by the environment and emotions, such as moving from a city with relatively high temperatures to a city with low temperatures, which may cause a delay in menstruation. In addition, emotional changes, such as emotional shock, can also cause a delay in menstruation, but the delay in menstruation is not related to intercourse, as intercourse itself is a normal physiological activity and does not cause a delay in menstruation.