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Why Do Doctors Recommend a Genetic Test?

Genetic testing enables doctors to determine defective genes for diagnosis of medical conditions that one is likely to develop. In this test, samples of tissues of fluid from the body are examined by the doctors.

Genetic testing (amniocentesis or chorionic villus sampling) that is conducted on a 15 to 20 weeks expectant mothers is a blood test that determines genetic disorders that may affect the unborn baby. The baby’s gender and genetic problems that may affect it are determined by inserting a hollow syringe into the abdomen of the woman, and a small amount of amniotic fluid is drawn from the area near the fetus for testing.

Although amniocentesis shows how the lungs of the baby have developed in case premature birth is to be expected, but the process can also lead to a miscarriage. Chorionic villus sampling is done on a 10 to 12 weeks pregnancy whereby a small piece of the placenta is removed for genetic testing on the fetus. The procedure can also induce a miscarriage. Who must undergo a genetic test?

A genetic test is done on a woman who has experienced two or more miscarriages. Specific chromosome problems in the fetus a trigger miscarriage.

Most of the children who have genetic health conditions are born of older parents hence doctors strongly insist on genetic testing for older parents.New dominant gene mutations affect children who are born of older fathers more than those who have younger fathers. Chromosomal problem s mostly affect children who are born of women who are 34 years and above.

A woman who has given birth a stillborn child who has physical signs of a genetic illness also needs the test. The baby may be born alive but if it has severe birth defects the mother needs a genetic test although other causes of birth defects include poison or toxic substances, physical trauma or infection before delivery.

Doctors have to find out whether a parent (who has a relative suffering from a genetic illness) is a carrier of the genetic illness or not. The doctors will protect the fetus from developing the genetic illness. You may not show signs of the disease if you are a carrier because it is a recessive gene in you, but the gene can be transferred to the child. If the child gets the recessive gene and a normal dominant gene from the other parent, he or she will also not show the signs and symptoms of the disease, but the gene can be passed down to its kids.

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