Healthy women also have children with Down's syndrome?

Down syndrome is an accidental disease, which is caused by the abnormal number of chromosomes carrying genetic genes. Moreover, the disease is random and has no obvious family history. Even healthy couples may have children with Down's syndrome.

Down syndrome is the most common chromosomal disease in children. The main characteristics of children are mental retardation, physical retardation and particularly large face. The reason for this disease is that chromosome 2 1 does not separate during meiosis, forming abnormal eggs. With the increase of the mother's age, the incidence of the disease also increases, especially when the pregnant mother is over 35 years old.

A 20-year-old woman may also have children? Dunn's son

China is one of the countries with high incidence of birth defects in the world. Every year, more than 654.38+0000-654.38+02000 newborns have birth defects, accounting for about 20% of the world. One of the most common is Down syndrome. In Chinese mainland, about 26,000 children with Down syndrome are born every year.

Down syndrome is an accidental disease, which is caused by the abnormal number of chromosomes carrying genetic genes. Moreover, the disease is random and has no obvious family history. Even healthy couples may have children with Down's syndrome.

It is generally believed that the risk of Down's syndrome increases with the growth of the mother's age, especially for pregnant women over 35 years old. But clinical findings show that women in their twenties can also give birth? Dunn's son. Because the proportion of young pregnant women is generally large, this part of the population was born. Down's son is not a small number. Experts believe that pregnant women of all ages can give birth? Dunn's son.

Many pregnant women ignore Down's screening.

Although the condition of Down's syndrome is attributed to gene chromosome abnormality, it is undeniable that the aggravation of urban environmental pollution, virus infection, drugs, radioactive radiation and other factors may cause Down's syndrome.

Unfortunately, there is no medical treatment for Down syndrome at present. The only way to take is to find it as early as possible through prenatal screening and diagnosis, so as to make a decision to terminate pregnancy earlier. However, in prenatal screening, many people ignore Down's screening.

Even in a big city like Shanghai, the coverage rate of Down syndrome screening is less than half. Even those expectant mothers who choose to receive Down's screening still have various misunderstandings in their concepts. For example, many pregnant women think that Down's screening will not be available until the second trimester, and only older women need screening, which is harmful to the fetus. These misunderstandings have greatly reduced the enthusiasm of pregnant women for screening for Down's syndrome.

Advance Down's screening to 10- 14 weeks of pregnancy.

In the past, pregnant women had to wait until the second trimester, that is, 15-20 weeks before screening for Down syndrome. At present, Down syndrome screening in the first trimester (10 week-14 week), which is widely used in many developed countries and regions around the world, has been gradually carried out in several cities. Duan Tao believes that it is particularly important to gradually popularize screening for Down syndrome in early pregnancy.

There is another important reason for early screening. After the fetus is more than 20 weeks old, there will be fetal movement, and pregnant women will feel that the fetus has interacted with themselves and regard it as life. However, if the fetus is found to have Down syndrome, terminating pregnancy at this time will cause great psychological trauma to pregnant women. Therefore, early detection, early diagnosis and early intervention are advocated internationally.

At present, a new generation of Down syndrome screening in the first trimester only needs B-ultrasound examination and 3ml venous blood. This method is simple and safe, which effectively reduces the damage to pregnant women and fetuses caused by invasive diagnostic methods such as amniotic fluid diagnosis, chorionic sampling and umbilical cord blood, and the accuracy rate is as high as 85%-90%.

. Icon _ Sina,

. icon_msn，

. icon_fx{

Background-location:

2px

- 1px}

. icon_msn

{Background-Position:

-25 pixels

- 1px； }

. Icon _ Foreign Exchange

{Background-Position:

-240 pixels

-50px； }