Dizziness on the 8th day of blastocyst implantation may be the manifestation caused by various factors such as early pregnancy reaction, hypertensive disease, hypoglycemia and so on. 1. Early pregnancy reaction: on the 8th day of blastocyst transfer, the level of human chorionic gonadotropin and progesterone and other sex hormones in pregnant women’s body increases obviously, which may affect the brain to a certain extent, and dizziness and other symptoms of early pregnancy reaction may appear. 2. Hypertensive disease: if the woman on the 8th day of blastocyst implantation, the hypertensive disease attack causes the blood pressure to increase, and the cerebral blood vessels in the cranial cavity dilate, it may cause dizziness. 3. Hypoglycemia: Dizziness may occur if a woman does not eat in time on the 8th day of blastocyst transfer or if she suffers from a significant decrease in blood sugar caused by various pathogenic factors. On the 8th day of blastocyst transfer, there are more causes of dizziness, which need to be treated according to different causes under the guidance of specialized doctors.