The fetus is wrapped in amniotic fluid, placenta and the mother's abdominal wall, and the things they can perceive is really limited. Most of the gains of the fetus are from the mother. In addition, it has been proven that one of the most significant things that a fetus can obtain directly from the outside world is high-quality and low-frequency sound.
The fetus begins to develop hearing in the 4th~6th week; it can feel the mother's uterus sound in the 15th~20th week; and its hearing is basically the same as adults in the 25th week. In the late stage of pregnancy, the fetus can even recognize the parents' voice. Many studies have shown that music is indeed beneficial to all aspects of fetal development, and that communication between parents and fetuses can have unexpected effects.
Therefore, since the middle stage of pregnancy, it is recommended that fathers and mothers-to-be shall:
Create a musical environment at home. You can choose melodious and light music, and focus on the type of music that the mother-to-be likes.
Try to arrange language communication or fetal music education in a fixed time of day.
Make sure the volume is proper, whichever the mother-to-be feels comfortable and pleasant.
Do not place the player or headphones on the mother's belly, which may cause irreversible damage to the baby's hearing.
Give your baby an infant name, to make the communication more cordial and natural.