Early pregnancy reaction usually occurs around 6 weeks, with reactions such as drowsiness, loss of appetite, nausea, vomiting, breast tenderness and poor mood, etc. It will disappear on its own around 12 weeks, and some pregnant women will disappear only around 17 weeks. During this period, pregnant women should regulate their mood and eating habits. Women who have a week delay in menstruation after intercourse with regular periods should test for an early pregnancy test. If it shows pregnancy, it is recommended to go to the hospital around 40 days to check the ultrasound to see if it is intrauterine or ectopic. If there is bleeding during early pregnancy, it is recommended to go to the hospital to see the doctor to check the value of progesterone to see if it is necessary to carry out birth control treatment and to check the cause of bleeding.