Early pregnancy reactions are closely associated with early pregnancy because of an increase in pregnancy-related hormones such as progesterone, estrogen and progesterone, and a significant rise in human chorionic gonadotropin.
Early pregnancy reactions are mainly gastrointestinal symptoms, but some people may also experience dizziness and headache. However, if the dizziness and headache are obvious, it should be considered that there may be abnormalities of the cerebral blood vessels, abnormalities of the brain nerves, and there may be causes of anemia, or cardiovascular diseases, and cervical spondylosis, all of which can cause dizziness and headache during pregnancy.