The Morphological structure of human fetal sentience system has been formed in early pregnancy , and with the pregnancy progress being perfect and mature. In the Middle-late pregnancy the fetus can perceive external voice and generate the corresponding response. Analyzing the fetal heart rate ,fetal movement, and the reaction of the central nervous system after sound stimulation, can determine fetal development status, and keep abreast of safety condition and fetal intel ectual development in the uterine . It is of great significance to eugenics.
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