There is no authoritative information on how many weeks the fetus can hear external sounds. Generally speaking, the fetus can hear external sounds at around 16 to 20 weeks, depending on the development of the fetus. Usually, the hearing system of the fetus begins to develop gradually at about 6 weeks of pregnancy, at present, there is no authoritative information on how many weeks the fetus can hear external sounds. Generally speaking, it is believed that the fetus can hear external sounds when it reaches 16~20 weeks, and the auditory system is getting more and more mature, and when stimulated by sounds, it will show that the fetus moves faster or stirs its legs. However, due to the obvious individual differences in the development of each fetus, it is impossible to generalize the exact time when the fetus can hear external sounds. Generally at this stage, pregnant women can provide auditory fetal education to the fetus, such as chatting, telling stories, playing music, etc., which is conducive to the growth and development of the fetus. During pregnancy, women need to strengthen their daily life management and go to the hospital on time for pregnancy checkups to observe the development of the fetus.