Parents are normal. Why are children deaf and dumb? Does the baby carry the deafness gene?

At present, the proportion of deaf-mute people in China is still relatively high. Some children are born deaf, but their parents are normal. This should be because recessive genes are passed on to children. This kind of treatment can be improved early. Please see my introduction for details!

Parents are normal. Why are children deaf and dumb?

Children with normal parents are deaf, and both husband and wife may carry the same deafness gene. After the combination of the two, there is a certain chance to give birth to a child with dominant hereditary deafness. Doing genetic testing in advance and understanding genetic inheritance can prevent the birth of deaf children. Especially if the first child has already given birth to a deaf child, it is best for both husband and wife to check the deafness gene together with the first deaf child to determine whether it is hereditary deafness and then deal with it accordingly.

What is the probability of deaf children with normal parents?

In the survey, 80% parents of deaf children have normal hearing. According to epidemiological investigation, the carrying rate of common deafness gene mutation in China population is as high as 3%-5%. If parents with normal hearing also carry the same genetic deafness gene, there is a risk of giving birth to deaf children. When parents carry the same pathogenic genes such as GJB2 and SLC26A4, the probability of hearing loss at birth is 25%.

If the couple has a second child, there is also a risk of deafness of 1/4. In addition, just like a pregnant woman with drug-induced deafness gene, her hearing can be normal, but all her children carry drug-induced deafness gene. In the subsequent growth and development process, aminoglycoside drugs such as kanamycin, gentamicin and streptomycin may cause lifelong deafness due to fever and other diseases.

Can the baby carry the deafness gene?

Attention should be paid to infants with deafness genes, and such children are prone to congenital hereditary deafness, so they should be examined as soon as possible and take relevant measures to intervene and control them.

Through the genetic screening of children's deafness, these children can find out whether they are deaf as soon as possible and take relevant measures to avoid inducing factors, thus preventing hearing loss. You should also pay attention to avoid using potential drug-induced deafness as much as possible, such as prohibiting the use of aminoglycoside antibiotics as much as possible.