The states are less common than cystic sistiese spierdistrofie and watch over, some people have never heard of trisomy 18 or trisomy 13
In Britain, trisomy 18 (Edwards syndrome called the doctor who identified it) in 3000 live births from all over, with girls is three times more numerous. Trisomy 13 (Patau syndrome or) occurs in one in 4000 live births in both boys and girls.
This is because Rome is the most common chromosomal abnormalities of Down syndrome, also called trisomy 21.
How can trisomies?
The "three", the word means in trisomy. At conception, 23 chromosomes farm kid from his father and 23 chromosomes from his mother. It combines a child with 46 chromosomes in each cell, two of each.
Each chromosome has a "job" in the cell and carries certain genetic material. Down syndrome occurs when three chromosomes baby in a position rather than the usual.
Born on average 400 children per year with trisomy 13 or 18, with most cases diagnosed in late pregnancy. Most trisomies (about 95 per cent) full trisomies. This is the extra chromosome in each cell in the body of the child to go. This is not the type of trisomy hereditary, and not because of anything the parents did or did not.
Since half of pregnancy, miscarriage - often a woman knows she is pregnant - do not know many couples, a chromosome abnormality child.
In contrast Down syndrome, trisomy 18 and trisomy 13 is usually fatal, with most affected children die before birth, and for those who live a normal birth a few days. However, a small number of children (less than 10 per cent) at least one year, and some children who survived living in their adolescence.
Experts know how trisomy happen, but why this happens. What do they know that the risk increases for a child with Down syndrome with age. But most children with Down syndrome mothers in their twenties, because more children are born to women in this age group.
Features of trisomy 18 and 13
The features of trisomy 18 heart and kidney defects, esophageal atresia (the esophagus to the stomach of a commitment that the child does not eat by mouth, then do so), hands crinkled, deformed feet - known as the rocker feet, micrognathia (small jaw) and the development Agter serious teeth.
As with trisomy 18 Babies with trisomy 13, cardiac and renal lesions and the rocker were born feet below. Other features include extra fingers and toes, the head is not small (Mikrosefalie), in half of the brain during gestation (holoprosencephaly), are missing or wrongly nose, lips and / or cleft palate and disability severe mental to share.
Diagnosis
Where deficiencies that we believe that the ring kand ultrasound, and increase the likelihood of Down syndrome and parents will be presented to other tests to ensure (as a lake or a history amniosintese biopsy).
The two tests with a small needle into the uterus. The disadvantage of these two diagnostic procedures in the risk of miscarriage. But you and your partner decide whether a child with a probability of Down syndrome is high enough to cover the increased risk of miscarriage when to accept additional testing. Some couples see it as a risk of 1 in 100 as a 99 percent chance of good things, and so make the decision without further diagnostic testing. Some believe that enough to justify a risk in 1000 for further investigation. The decision really comes from you.
In Britain, trisomy 18 (Edwards syndrome called the doctor who identified it) in 3000 live births from all over, with girls is three times more numerous. Trisomy 13 (Patau syndrome or) occurs in one in 4000 live births in both boys and girls.
This is because Rome is the most common chromosomal abnormalities of Down syndrome, also called trisomy 21.
How can trisomies?
The "three", the word means in trisomy. At conception, 23 chromosomes farm kid from his father and 23 chromosomes from his mother. It combines a child with 46 chromosomes in each cell, two of each.
Each chromosome has a "job" in the cell and carries certain genetic material. Down syndrome occurs when three chromosomes baby in a position rather than the usual.
Born on average 400 children per year with trisomy 13 or 18, with most cases diagnosed in late pregnancy. Most trisomies (about 95 per cent) full trisomies. This is the extra chromosome in each cell in the body of the child to go. This is not the type of trisomy hereditary, and not because of anything the parents did or did not.
Since half of pregnancy, miscarriage - often a woman knows she is pregnant - do not know many couples, a chromosome abnormality child.
In contrast Down syndrome, trisomy 18 and trisomy 13 is usually fatal, with most affected children die before birth, and for those who live a normal birth a few days. However, a small number of children (less than 10 per cent) at least one year, and some children who survived living in their adolescence.
Experts know how trisomy happen, but why this happens. What do they know that the risk increases for a child with Down syndrome with age. But most children with Down syndrome mothers in their twenties, because more children are born to women in this age group.
Features of trisomy 18 and 13
The features of trisomy 18 heart and kidney defects, esophageal atresia (the esophagus to the stomach of a commitment that the child does not eat by mouth, then do so), hands crinkled, deformed feet - known as the rocker feet, micrognathia (small jaw) and the development Agter serious teeth.
As with trisomy 18 Babies with trisomy 13, cardiac and renal lesions and the rocker were born feet below. Other features include extra fingers and toes, the head is not small (Mikrosefalie), in half of the brain during gestation (holoprosencephaly), are missing or wrongly nose, lips and / or cleft palate and disability severe mental to share.
Diagnosis
Where deficiencies that we believe that the ring kand ultrasound, and increase the likelihood of Down syndrome and parents will be presented to other tests to ensure (as a lake or a history amniosintese biopsy).
The two tests with a small needle into the uterus. The disadvantage of these two diagnostic procedures in the risk of miscarriage. But you and your partner decide whether a child with a probability of Down syndrome is high enough to cover the increased risk of miscarriage when to accept additional testing. Some couples see it as a risk of 1 in 100 as a 99 percent chance of good things, and so make the decision without further diagnostic testing. Some believe that enough to justify a risk in 1000 for further investigation. The decision really comes from you.
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