However, due to individual differences and different sensitivities, there may be some different feelings, such as abnormal body sensations, some people may experience flu-like symptoms such as weakness, dizziness, drowsiness, loss of appetite or nausea and vomiting when the fertilized egg is implanted. Some may experience vague pain or soreness in the abdomen, which is mild and similar to abdominal pain during menstruation; some may experience breast tenderness and nipple tenderness, which is similar to breast pain before menstruation; some may also experience a small amount of vaginal bleeding, which is considered as bleeding at implantation and usually lasts for 2-3 days and will disappear gradually; some may experience an increase in the frequency of urination, but no symptoms of urinary urgency or pain.