What is a trisomy?

trisomy is a form of aneuploidy, abnormality in which the body has an incorrect number of chromosomes. In humans, a normal child will have 46 chromosomes in 23 pairs, each parent contributes 23 chromosomes. When trisomy occurs, one of the chromosomes has another couple, resulting in 47 chromosomes instead of 46. The results of these other data may vary, but tend to manifest in the form of congenital defects, some of which may be quite serious. Somewhere along the road, the chromosome duplicates twice and creates a whole couple. When an egg or sperm connects with their counterpart, another chromosome is made to create a set of three, where there should be two. In some cases, the chromosome only partially duplicates, leading to a partial trisomy. I, after a doctor who identified it. Pataus syndrome is characterized by physical and mental defects, with heart defects very common. Trisomy 18 is known as Edward's syndrome and is accompanied by serious mental and physical problems; Most patients do not surviveafter a year. Trisomy 21 is Down's syndrome, a condition that is often accompanied by severe mental disabilities.

There are other forms; For example, trisomy 16 usually triggers abortion, while trisomy 9 leads to malformations in the skull and nervous system. The number in each name concerns the chromosome; In some cases, patients have a mosaic trisomy, which means that the defect occurs only in certain cells. Trisomy 16 is considered to be the most common form in humans, while Trisomy 21 is the most common form in viable infants.

It is possible to test trisomy along with other potential births and women who are endangered by the condition can undergo prenatal testing to check for them. If a prenatal test, such as amniocentesis, detects trisomy, the doctor will discuss the possibilities with the patient. In some cases, doctors may recommend that pregnancy be ukoncin because the child is inanimate. Some parents may decide to continue with pregnancy, for ethical or moral reasons. Some people with a trisomy leave happy, full of lives, while other infants survive only a short time after birth.