Why do babies not cry when they are born?

Usually in TV dramas, when a woman is giving birth, the husband will pace anxiously outside. When he hears the sound of a baby crying in the delivery room, he will show a happy expression and say that his child is born. Therefore, the sound of a baby crying in the delivery room usually represents the birth of the baby, but some mothers do not understand why the baby does not cry after being born, or whether the baby has any disease.

The fetus does not breathe in the womb, so after birth the baby must rely on its own breathing to inhale oxygen and expel carbon dioxide. There is no air in the fetus' lungs, which are still a solid mass of tissue. After the baby is born, its body is no longer curled up, and the originally contracted thorax suddenly stretches, the chest cavity immediately expands, and the lungs open as well, and the baby inhales the first breath of air.

When air enters the alveoli from the trachea, the inspiratory muscle groups relax immediately, the expiratory muscle groups contract immediately, and the chest cavity contracts to its original size, forcing the air in the lungs to be expelled. When the exhaled gas passes through the larynx, the laryngeal muscles contract, the two vocal cords in the laryngeal cavity are stretched tight and close together, the gas impacts the vocal cords, and the vocal cords vibrate, making a crying sound.

When a baby is born, there is more carbon dioxide in the blood.

It stimulates and excites the respiratory center, so everyone breathes in big gulps. Therefore, every baby will cry like this for a while after birth, and when the breathing activity establishes a normal rhythm, the baby will stop crying.

(1) Continuation of fetal intrauterine hypoxia. Any cause that affects blood circulation and gas exchange between mother and child will cause fetal intrauterine hypoxia and aggravate intrauterine distress.

(2) Respiratory tract obstruction. It is the main cause of neonatal asphyxia. The fetus suffers from intrauterine hypoxia and undergoes respiratory movements during delivery, causing amniotic fluid, mucus, meconium, etc. to be inhaled into the trachea, causing airway obstruction.

(4)The influence of anesthetics. The use of anesthetics or sedative analgesic injections by the mother during labor can sometimes cause depression of the fetal respiratory center, and the fetus will only cry after being rescued after birth.