How long does it take for the baby in the belly to hear sounds? Will the baby in the belly smile bitterly?

How much do you know about pregnancy? Today, let's learn about the baby in the belly. How long does it take for the baby in the belly to hear sounds? Can the baby in the belly smile bitterly? Let's learn together with the editor.

It is common for babies to cry when they are a few days old. If the mother holds the baby on her left chest, the baby will soon calm down. This phenomenon may not be noticed by young mothers, but it has caused scientists to think deeply. It turns out that the fetus has already gotten used to the sound of the mother's heartbeat and blood flow when it is in the mother's body. After birth, the baby's ears are close to the mother's chest. This sound and beating bring the baby back to the peaceful days and safe environment of the past. This sense of security that has long been experienced is incomparable to any beautiful music. The fetus has hearing at 4 months. At 6 months, the fetus's hearing is almost the same as that of an adult. The sounds from the outside world can be transmitted to the womb. However, the fetus feels more comfortable with sounds of 500 to 1500 Hz, likes to listen to music with a slow, smooth and soft rhythm, hates strong and fast-paced "disco", and is even more afraid of all kinds of noise that can be fatal.

Yes.

1. The baby's hearing has already begun to develop while in the mother's body, and it can distinguish different tones after birth;

2. Babies aged 8 to 12 weeks can stop restless movements and crying when hearing soft melodies;

3. From 8 to 20 weeks, smiling and purring are the sounds made by babies. They will respond to these exciting or familiar sounds and turn their heads to look for the sounds.

What position does the baby in the belly usually maintain?

1. Sleeping curled up: In fact, babies spend most of their time sleeping during the long ten months of growth and development in their mother's belly. Of course, sleep can be divided into quiet and active types. Most of the time, babies are in active sleep, when they stretch their hands and legs, and this posture will last for about 40 minutes. Only about 20% of the time, babies are in quiet sleep, when most of the time they are in a curled-up position.

2. Swimming posture: Before the baby is fully developed and can be called a "fetus", it will swim around in the mother's uterus, and often has no fixed posture at this time. Except for sleeping time, most babies are actually quite active and floating is their normal state. This posture will last from the baby's sixth week until the late pregnancy, when the mother's uterus is no longer large enough for it to float.

3. Free movement posture: Babies are very energetic in their mother's belly, and moving their arms or bending their fingers and toes are their most basic movements. In the first and second trimesters of pregnancy, because the bones are not fully developed, the baby's movements are only bending, stretching or turning the palms. In the later stages of pregnancy, when the bones gradually harden, kicking or rolling over become their favorite exercise postures.

What is fetal movement?

Fetal movement is the movement of the fetus in the uterine cavity. Generally, the fetus begins to move around 16 to 18 weeks in the uterus. At the beginning, the range of motion of the fetal limbs is relatively small, and it is not easy for pregnant women to feel it. Most of them can feel fetal movement around 18 weeks after menstruation. If the pregnant woman herself is not sensitive, the time to feel fetal movement may be delayed, but generally not more than 20 weeks. Under normal circumstances, the fetal movement is about 3 to 5 times per hour. Normal fetal movement indicates that the placenta functions well and the oxygen delivered to the fetus is sufficient. If there is abnormal fetal movement again, such as an increase or decrease, it may be related to hypoxia. Go to the hospital in time to monitor the fetal heart rate and check the baby's condition.