The critical period of fetal brain development can be roughly divided into three periods according to the characteristics of growth and development, namely, before 8 weeks, 20-30 weeks, and 30 weeks to birth, and there can be slight differences between different fetuses.1. Before 8 weeks’ gestation: the fetal brain cells develop gradually, and the neural embryo is formed on the 19th day, and the closure starts to arise from the bottom end on the 26th day or so and extends downward for the spinal cord, and the fetal brain has already had a basic The fetal brain has taken on a basic shape by the eighth week. During this period, the brain is prone to malformations, and fetal neural tube malformations should be prevented; pay attention to avoiding strong tea and coffee, colds, medications, viral infectious diseases, avoiding contact with X-rays, prohibiting smoking and alcohol, nutritious diets, and increasing the intake of fish, nuts, and other foods, which are conducive to fetal brain development; 2. 20-30 weeks of gestation: the fetal brain cells begin to proliferate, and auditory and visual senses begin to appear slowly, and the The structure of brain cells becomes more and more complex, there is a period of rapid proliferation, and fetal movement also begins to appear. At this stage, it is suitable to give appropriate stimulation to the fetus, such as listening to soothing music, chatting with the fetus softly, which can help to help the development of brain function; 3. 30 weeks of pregnancy to birth: neurons and other important components of the fetal nervous system will continue to develop, and gradually complete and coordinate the brain and nerve function, the pregnant woman should maintain a good nutritional state, and she can exercise moderately every day, keep a pleasant mood, and promote the perfection of the fetal brain function. Functional perfection.