One cannot feel or react to the union of the egg with the sperm, and there are no visible reactions in the early stages of pregnancy. Usually, menopause occurs after the first month of pregnancy. When the secretion of chorionic gonadotropin in the body reaches a certain amount, then early pregnancy reactions such as nausea, vomiting, drowsiness, weakness and dizziness may occur. If you want to know if you are pregnant urgently, you can go to the hospital to check the blood HCG about 10 days after intercourse to confirm the diagnosis, or you can use early pregnancy test paper after 7 days of delayed menstruation to detect the pregnancy. If pregnancy is confirmed, pay attention to rest, avoid strenuous exercise and heavy physical labor, take folic acid tablets in time to prevent fetal development malformations, and take regular pregnancy tests.