DNA Testing After Birth

Submitted by Medical Health Test Team on October 16, 2012

DNA testing after birth can be done for two reasons. The first could be to determine paternity, if a woman is not sure who the father of her child is. The second reason for a DNA test or a gene test is to check for specific genetic disorders. DNA testing after birth poses no risk for the child. A DNA test is a specific test that involves a close examination of the DNA molecule itself. The results of a genetic test can help to confirm if a newborn is suffering from a particular inherited disorder. There are several types of DNA tests available these days:-

  • Diagnostic testing
  • Prenatal testing
  • Forensic testing
  • Preimplantation genetic diagnosis
  • Research testing
  • Newborn screening
  • Parental testing
  • Predictive and presymptomatic testing

A DNA test for paternity is often carried out as it helps in legal cases which include child support and custody cases. Establishing the paternity of the child is important for several reasons: one being to protect the child and his/her rights and also well being. DNA testing after birth for paternity can help provide an accurate medical history for a child which will help the child in years to come. A DNA test for paternity should be done as soon as possible if there is any doubt as to who the child’s father is. The various types of after birth or post natal paternity testing are:-

  • Umbilical cord collection and testing
  • Blood collection and testing
  • Semen, hair, tissue etc (other sample collection and testing)
  • A Buccal swab (cheek swab) collection and testing

The cost of the DNA testing after birth depends on the type of procedure being performed. The tests may be expensive and results only available after a week or two but this DNA test can be ordered by anyone. Keep in mind that only a small amount of blood will be drawn for the test. Blood samples are usually taken from the arm of a child as it is less painful than taking it from the finger or heel. The most convenient way however, is to test the blood from the umbilical cord of a new born baby. This can be done soon after the baby is born.

DNA tests are routinely conducted on newborns. These are used to detect and identify genetic disorders that could be treated as soon as they are discovered. DNA testing after birth is usually carried out to check for either congenital hypothyroidism or phenylketonuria.

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