Due to changes in hormone levels during pregnancy, or stimulation from the surrounding environment and interpersonal tension, pregnant women may experience anxiety and tension, which may easily lead to depression during pregnancy, which may have adverse effects on the pregnant women themselves and the development of the fetus. Therefore, early symptoms can be judged so that early measures can be taken to deal with them. Usually, pregnant women may have the following series of precursors of depression: 1. Mood changes: pregnant women will have more obvious mood changes, daily frustration, depressed mood, indifferent feelings, easy to get angry, often sad and tearful for no reason, and this negative mood will be aggravated at night. Pregnant women will also experience loneliness and be reluctant to contact and communicate with others; 2. Insomnia: frequent rumination, unexplained fear, low self-esteem and anxiety, insomnia and fatigue; 3. Reduced self-evaluation: pregnant women may feel that their physical condition is poor, leading to self-loathing, hostility and suspicion towards people around them, and poor relationship with their spouses and family members; 4. Slow thinking: due to the fact that the body during pregnancy is more easily tired, pregnant women may have impaired thinking, reduced ability of independent thinking, reduced initiative, inability to concentrate and easy to forget things; 5. Anorexia: pregnant women may lack confidence in life, feel that life is uninteresting and meaningless, do not like to be active and have a reduced appetite, which will lead to anorexia. If these manifestations are mentioned above, pregnant women themselves or their family members should pay attention to them, adjust them as early as possible, and consult a psychologist if necessary.