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Causes of congenital deafness

Congenital deafness refers to deafness caused by the mother’s pregnancy process, abnormalities during childbirth or genetic factors. Mostly sensorineural deafness.

The pre-3 months of the mother’s pregnancy is a critical period for the development of the inner ear of the fetus. If the mother is infected with a virus such as a cold or rubella or syphilis during this period, it may hinder the normal development of the inner ear of the fetus and cause congenital hearing loss.

In addition, mothers suffering from various toxic diseases during pregnancy, such as diabetes, nephritis, thyroid dysfunction, abdominal X-ray, long-term deep anesthesia, various toxic drugs, threatened abortion, etc., may also affect fetal inner ear development.

During the delivery of the mother, including the birth and several days after the birth of the disease, such as premature delivery, dystocia, umbilical cord around the neck, trauma during childbirth, respiratory blockage caused by neonatal hypoxia, can cause hearing loss in newborns.

In addition, neonatal severe jaundice, hemolysis, and different Rh factor factors in the mother and child can also cause hearing loss in newborns.

When a close relative gets married, the incidence of hereditary hearing loss increases relatively as the couple have an increased chance of having the same deafness gene.

Hereditary hearing loss can occur at birth and may become apparent later.

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