The medical definition of pregnancy syndrome refers to the change of mood during pregnancy due to the restriction of the mother’s living and activity space, which can lead to dizziness, gestational hypertension, depression, irritability and so on. Most women have mood changes during pregnancy, and there are two factors that cause mood changes: one is due to physiological reasons, caused by the hormone level and endocrine changes in pregnant women’s bodies during pregnancy; the other is due to some psychological problems caused by physical changes, such as physical discomfort, thinking that they have become ugly, worrying about their husbands or colleagues’ dislike, etc. Irritability. During pregnancy, some diseases may occur, such as anemia and gestational hypertension, which may cause some syndromes during pregnancy.