Blastocyst implantation usually occurs 6-7 days after conception, while the latest implantation time is around the 10th day after conception. Under normal circumstances, the sperm and egg meet in the juxtaposition of the fallopian tube, and then combine to form a fertilized egg, which will gradually move to the uterine cavity for implantation, and it usually takes 6-7 days. If the woman ovulates slowly and the fertilized egg moves more slowly, the time for the fertilized egg to implant will be prolonged to about 10 days accordingly. Generally, if the blastocyst has not yet been implanted for more than 10 days, there may be problems such as defective fertilized egg, endometrial abnormality, etc. It is recommended to go to obstetrics outpatient clinic in time to clarify the cause of the disease. During the period of blastocyst implantation, pregnant women need to pay attention to ensure adequate sleep, maintain a happy mood, consume more foods rich in vitamin C, vitamin E, such as kiwifruit, do not eat cold, spicy food, avoid strenuous exercise.