Prenatal diagnosis Couples

Prenatal diagnosis Couples who are going through a pregnancy or who are planning the pregnancy can be tested for CFTR gene mutations, in order to determine the likelihood that a child with cystic fibrosis. The test is usually performed in one parent or both and, if detected at high risk of CF, was carried out also in the fetus. Because the prenatal diagnosis does not enable or higher forms of treatment alternatives, the main reason that occurs is, in practice, provide the possibility of abortion if the fetus has the disease.Cystic fibrosis testing in pairs is offered widely in countries like the United States, and the American College of Obstetricians and Gynecologists (ACOG, by its initials in English) recommends testing for couples who have a history of CF among their family members or close relatives, as well as those with high risk because of their ethnic affiliation. Because the development of CF in the fetus requires each parent to provide a copy of the mutant CFTR gene, and the high cost of prenatal testing, the test is usually performed initially, only one parent. If this turns out to be a carrier of a CFTR gene mutation, then examined the other to determine the risk of your child having the disease. CF can result from more than a thousand different mutations and, by 2006, it is possible to perform laboratory studies for each.The test refers to analyzing the blood for the most common, as F508 - most commercially available modalities detected no more than 32 different variants. If you know the fact that a family has a rare mutation, the latter can be sought specifically. Following that not all known mutations are detected by current tests, a negative result does not guarantee that the child will be free of the disease. Moreover, since mutations tested are necessarily those most common in the highest risk groups, testing in lower risk ethnicities is less successful because the mutations commonly seen in these groups are less common in the general population. Cariogram cytogenetic map or a girl, a result of amniocentesis Couples at risk, often conduct additional testing during pregnancy or before it occurs.IVF with preimplantation genetic diagnosis offers the opportunity to examine the embryo prior to its placement in the uterus. This test is performed three days after fertilization, looks for the presence of abnormal CF genes. If an embryo, are CTRF mutants identified two genes, it will be excluded from the transfer, introducing another that has at least one normal gene. During the course of pregnancy, testing can be performed on the placenta (chorionic villus sampling) and in the amniotic fluid surrounding the fetus (amniocentesis), with the help of ultrasound. However, chorionic villus biopsy correlates with risk of fetal death at a rate of 1 in 100, and amniocentesis of 1 in 200, and it is essential to determine the benefits adequately to weigh the risks before to proceed with testing.Alternatively, some couples choose to undergo assisted reproductive techniques with donor eggs (using IVF) or donor sperm (artificial insemination by donor).