What methods of prenatal diagnostics exist? Part 2.
In this article there is a wish to sort invasive methods of prenatal diagnostics.
Though prenatal diagnostics bears in itself some danger, but nevertheless in certain cases it is important and valuable.
From the article “ Why prenatal diagnostics is necessary? “ it is possible to learn in what cases and to whom it is applied. Prenatal diagnostics uses invasive and noninvasive methods of researches. Noninvasive methods are described in the article “ What methods of prenatal diagnostics exist? Part 1. “
Biopsy of a horion. This method allows to determine by
congenital defects of a fruit. This procedure by means of the special tool which is entered into a vagina is carried out. For the analysis the material having the name " undertakes; vorsin horiona “ (biological material of a fruit). Then molecular diagnostics is carried out. Widely this method is still not widespread.
By means of a biopsy of a horion it will be possible to reveal in the near future all 3800 violations which arise from - for this or that of defect of genes and chromosomes. Also it is considered that by means of this method, perhaps, pre-natal treatment of a fruit will be carried out. Quicker it would come “ fast future “!
Usually the biopsy of a horion is carried out on any term of pregnancy, but nevertheless to 9 weeks of pregnancy and in the third trimester try to see her seldom or never. Attractively in this research the fact that it can be seen off on rather early term of pregnancy what helps with a case of detection of violations at a fruit to make abortion less difficult and less offensive. Though how to tell … To make such decision even on the early term of pregnancy very and very difficult …
of Amniopunktion (amniotsentez).
In amniotic liquid which surrounds a fruit there are chemical compounds and microorganisms. These substances bear in themselves information on extent of development of a fruit, on a state of his health and genetic structure. For this reason amniotic liquid is of great importance in diagnosing of this or that deviation.
Usually the amniopunktion is carried out between 16 and 18 weeks. After capture on the analysis of amniotic liquid receiving results requires 25 - 35 days.
The amniopunktion as follows is carried out. Before procedure of the pregnant woman it is necessary to empty intestines and a bladder. Then it is stacked on a table. By means of ultrasonography define the provision of a placenta and fruit in order that when carrying out procedure not to touch them. Then the long needle is entered through a stomach and a uterus, and undertakes a little amniotic liquid for carrying out the analysis. All procedure lasts on average 20 - 30 minutes. Throughout all procedure at mother and a fruit pulse and a blood pressure is constantly controlled. Procedure not from pleasant … speak, of course, does not cost
About safety of the let method. The risk is small, but nevertheless is available! There is a probability of development of an infection owing to which there can be an abortion.
It is worth conducting this research only when in it there is an urgent need!
Kordotsentez. during procedure do to
an umbilical cord vein puncture. Thus receive a sample of fetal blood for the analysis. Do this procedure, as a rule, since 19 weeks of pregnancy. This method allows to diagnose hereditary diseases of a metabolism, hemoglobin pathology, definition a Rhesus factor - a factor of a fruit, group anti-genes. At treatment the Rhesus factor - conflict pregnancy by means of this method becomes intravenous blood transfusion if the fruit has a hemolytic illness. The risk of emergence of complications after carrying out this research makes 1,5% - 2,5%.
At once I want to notice that this method has no broad application. By means of an amnioskopiya diagnostics of amniotic waters is made. Deviations are defined proceeding from color of amniotic liquid. It is considered normal if amniotic liquid transparent. If it has green or brown color, it speaks about pre-natal sufferings of a fruit or about existence of an infection.
the Most interesting, but harmful method. It is quite risky procedure! For this reason has no broad application. Thanks to this method it is possible to establish the diagnosis by means of sampling of blood and fabrics of a fruit. But the same deviations can be diagnosed by means of less dangerous methods. Have it in a look!
During a fetoskopiya through a vagina or a puncture in a stomach the special tiny optical device is entered into a cavity of a uterus. This device allows to watch a fruit and even to take pictures! Application of this method only after 16 weeks of pregnancy is allowed.
Modern methods of diagnosing are more and more improved … And, who knows, maybe, in the near future it will help all to have healthy children. Or perhaps similar methods will become more harmless and will begin to give irreplaceable help to our future children!
You should not abuse this or that method. The world is improved! Surely there will come day when without harm for a fruit we are able to watch it in a womb and to treat him if in it there is a need!
I wish all of you good luck and health!